Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96fbcecc05441a1…

MALICIOUS

PDF

102.1 KB Created: 2021-03-30 10:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9f4221759bf086b9efd50b716e8181ac SHA-1: 0a8d12760d4e27003adae4b01900a94da771b470 SHA-256: d96fbcecc05441a1a8369b74c989757e292a180c958348104c36a76eb95af066
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure points to a phishing lure attempting to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/award?keyword=check+mark+symbol+on+keyboard+in+pdf PDF link annotation
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/cf0fea.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/foxadurarorenuwimaf.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/37765115531.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/9533bd64db.pdfIn PDF document text
    • https://lekudelido.weebly.com/uploads/1/3/1/3/131378953/2537169.pdfIn PDF document text
    • https://toginomaba.weebly.com/uploads/1/3/4/0/134042469/15162302.pdfIn PDF document text
    • https://momewevegugeb.weebly.com/uploads/1/3/5/3/135326076/2458019.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/e8c64cda-27c7-425f-a9a9-eb57ec32473f/literary_terms_list_and_definitions.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_6d7a602a0d5e49a5acdfda9ddb429769.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0deb634a-9a02-4864-ad40-4dfdc37be026/femulutimuwamelujikipodap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6187d5d8-9d23-4482-be20-f0a96075a9a9/how_long_to_cook_sweet_potatoes_in_ninja_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c948d23f-aeca-46af-beee-64747c926f48/busufavikomoxaved.pdfIn PDF document text
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_72ab567675b14418a639e0fe0a6d855e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8aa5dc1-c99a-4eda-9098-a1cc87a2c072/el_coronado_ranch_az.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_2b8fa502e56e4493bdb04000709e36f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ac3d80-4a28-4596-b85a-8b891e8a6aba/legit_ways_to_make_money_online_uk.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_894dc0ef93f742749ccf59b96d34905e.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_f44c481c02774496be4ccc9d0e098420.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/507e86c2-affd-49a1-98a1-89eb9c81eb19/what_was_the_new_social_contract_between_labor_and_management.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_e4f313ebc9ef4b1993d34fe50ee5cfd9.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/advanced_excel_tutorial_2016.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_153680f6e24f4f80a3fb8dd09faec59c.pdf?index=trueIn 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_off00010bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD6 6904 bytes
SHA-256: 9f35010077f848878cd043a01eb43868318038696857d0aece31378c5195ac5f
font_01_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 3192 bytes
SHA-256: f17a9a24c0786a18068cfab74f631f7741b1934bb2be1bcabe3dad5f0c10961d
font_02_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 5608 bytes
SHA-256: 5aa7115906dfe8039f28e8a4784157fce3d28f003cea477a77e47da7d7f1c86f
font_03_sfnt_off00013b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B70 2200 bytes
SHA-256: 2ad9c72633001d3b3fb2d11ab83ce657313bde260766b550804a3023f07bd22f
font_04_sfnt_off0001459a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459A 11240 bytes
SHA-256: 52fc46f4bbe55be212593a2df21506693556f1b3596d547158d01f6f4e5ec9f0
font_05_sfnt_off00016c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C22 17792 bytes
SHA-256: 06647565995d25fc8fe3e4347102d036ed0700d5f8827be76aafad6a140d95b8

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