Malicious PDF — malware analysis report

Static analysis result for SHA-256 825717105b47a61c…

MALICIOUS

PDF

120.5 KB Created: 2021-06-10 18:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e7720b9af9171877447761742f72cafd SHA-1: 184aca81fa22a49403eb16f561055d8b1737ff29 SHA-256: 825717105b47a61c07c78914fd87bcbcb6c18e5a59c37862e9f9b3c38c464c1b
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/pbw?utm_term=best+sinhala+keyboard+for+android PDF link annotation
    • https://volifaredibeg.weebly.com/uploads/1/3/1/4/131437601/283a41aff.pdfIn PDF document text
    • https://gexuganogos.weebly.com/uploads/1/3/0/8/130813630/26bf955.pdfIn PDF document text
    • https://wazawuxara.weebly.com/uploads/1/3/4/7/134762715/986702.pdfIn PDF document text
    • https://temadugebunexi.weebly.com/uploads/1/3/1/8/131871621/6a7f43f085431.pdfIn PDF document text
    • https://xekuruwagimutuz.weebly.com/uploads/1/3/2/6/132696141/3085848.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/lavojerazerolirog.pdfIn PDF document text
    • https://nugelemuv.weebly.com/uploads/1/3/0/7/130739301/d988da55d7.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/9559327.pdfIn PDF document text
    • https://xomikevogonenoj.weebly.com/uploads/1/3/4/7/134743799/5073380.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/kitituloparituloxu.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/wukisosofef-mudebifumomuw-finozukopixigu-miluzovota.pdfIn PDF document text
    • https://rakoroga.weebly.com/uploads/1/3/4/8/134887340/fd47a28.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/2c272414f25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/01517beb-c5d9-4f30-9e09-cb44a39438da/pipixegoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac64459-ce45-41a9-be86-2d7370a43077/how_to_use_3d_blender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e644f310-229f-4000-9168-35f815180968/11803571064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee8f21c-481a-46d4-b95d-33982d7d366b/33753120542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40553d5-9a91-4834-8b39-ac596f4b8a2b/what_is_a_superior_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c79475-acd5-4c40-b65d-bb7507f890e0/pekemotuvakukake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b0d2a1-339a-4683-a443-447eb1e163fa/what_are_the_creatures_in_underwater_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0798b7c5-6bdc-4baa-921c-5285df0469bf/academic_writing_jobs_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f35b77-d2c2-4b15-8b2c-20870199e71a/97090464458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cc07eb-86d0-4296-b761-a3b5cfb73ed2/how_to_guide_the_light_of_meridia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9310bd-cdb5-4d10-ab36-440d76894d07/charla_de_seguridad_n.o_2_sobre_la_covid-19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e737c82-894c-4704-bb20-638f1daffb1e/friedrich_nietzsche_pronunciation_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c941215-e262-45ea-b006-98337e4f8ba5/algebra_1_formulas_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68344f24-55c6-49b6-ac33-e72d1dae0751/65994901939.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11641 5140 bytes
SHA-256: d06e449b8ebf171cc6c7a504f3f65dee0ffc2e5e2162c6df4ea2fb1bcace0cea
font_01_sfnt_off0001276c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276C 45492 bytes
SHA-256: 138f4f9502141e2a606239ccd6825a85818eff57fe444de8863fefc1eae86351
font_02_sfnt_off0001896d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1896D 11340 bytes
SHA-256: 1b824a0631a3e3d9bdc1cf6d2248e3c5af18d5e147f078f47362f5176e266b55
font_03_sfnt_off0001b03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B03E 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_04_sfnt_off0001c506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C506 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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