Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c8634dc8754e96…

MALICIOUS

PDF

98.3 KB Created: 2021-05-18 11:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f3938e184ede290a7dad0b35a85f9a7 SHA-1: e79f8d89470d411354a0ee7a7e0641f1df497a05 SHA-256: 19c8634dc8754e9649d2d5de4350de6eef0d56ceac1a6ccc1d83b389a5b138d1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely serves a malicious purpose. The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, possibly involving JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 6

  • 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.
  • 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://ponafet.ru/strik?utm_term=realidades+capitulo+5b-3+answers PDF link annotation
    • http://taxazofesa.iblogger.org/why_is_my_smart_tv_not_connecting_to_internet.pdfIn PDF document text
    • https://nemulokisen.weebly.com/uploads/1/3/4/4/134492012/f970b7e7aaeb.pdfIn PDF document text
    • https://jamibubobew.weebly.com/uploads/1/3/5/3/135322635/misujifi-xukupugevofadel-rodonuvozo-sezaxit.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/kunosak.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/96e794a5c2.pdfIn PDF document text
    • https://xegubivagemegi.weebly.com/uploads/1/3/4/4/134481439/zifoniferezetabax.pdfIn PDF document text
    • https://xukaxibuban.weebly.com/uploads/1/3/4/7/134701669/c9b283fc123867.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/5810759.pdfIn PDF document text
    • http://wodidovurezugeg.22web.org/5288492787.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/mumujaneba_legomotirazita.pdfIn PDF document text
    • https://rutikaxa.weebly.com/uploads/1/3/0/7/130738846/9935141.pdfIn PDF document text
    • https://tinuvireredat.weebly.com/uploads/1/3/4/8/134864568/pubenanexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c20a5b-0dc6-4858-a4b0-40ad420b9dfd/adidas_employee_store_portland_pass_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/mogesorenemumez.pdfIn PDF document text
    • http://redebalumu.rf.gd/dell_precision_t5500_ram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf6d79e-1bc4-4705-a92c-6e34fa7631c9/vajodelowoxiletamawabe.pdfIn PDF document text
    • http://naxufiregukorer.rf.gd/73866641618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b596b402-d515-4410-ad05-81da4da4191c/14232397055.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/how_do_i_connect_my_jawbone_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/wojamumabumilulokuledano.pdfIn PDF document text
    • http://dususawikupap.epizy.com/el_resumen_del_cuento_los_crimenes_de_la_calle_morgue.pdfIn PDF document text
    • http://xizajitidug.rf.gd/zawiwosupak.pdfIn PDF document text
    • http://nijetazum.epizy.com/half_crazy_freestyle_music_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab81a6d-aed2-4ef4-b31f-d9023b27df43/my_forbidden_face.pdfIn PDF document text
    • http://saditufawixak.rf.gd/49962051138.pdfIn PDF document text
    • http://zidufixeda.epizy.com/adobe_photoshop_cc_2015_bangla_tutorial.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 6416 bytes
SHA-256: 9e91590ae502ff902ba306624a00c8d44396a7ee9717b1bfa1717db63fe08483
font_01_sfnt_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 5628 bytes
SHA-256: 799e4f6fe03410e7cb797deac00cb88eac1d601f06e7ac8220c5bfe820994f30
font_02_sfnt_off00010c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C80 11784 bytes
SHA-256: 4a8b74ec30de1be769bf9cd330ab96403cf8615dfbad56d23cb08108e19ca538
font_03_sfnt_off000131c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C9 12188 bytes
SHA-256: 0427b51204490bde072803aed762c78b13895c4e6a75ec8bfe1f9752e6bb536f
font_04_sfnt_off00015aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA3 16432 bytes
SHA-256: 30f233004798a89067e34dbabf2f597cdd3e50c335471f48888bd6b46fd1a317
font_05_sfnt_off000170b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170B7 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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