Malicious PDF — malware analysis report

Static analysis result for SHA-256 8564874a6cdac5ba…

MALICIOUS

PDF

69.5 KB Created: 2021-05-29 14:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 55600402d4f4c2e0de9c65b598c3beb4 SHA-1: 333642000cb213c333177b40119f18e3342c6101 SHA-256: 8564874a6cdac5ba15ef037fae47547a98b9ee4673292485d69eabda3521e3a8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to suspicious domains, likely used to host malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=which+states+have+adopted+the+restatement+second+of+contracts PDF link annotation
    • https://vopilexazum.weebly.com/uploads/1/3/2/7/132740267/6162923.pdfIn PDF document text
    • https://suvojenedixu.weebly.com/uploads/1/3/4/3/134354738/dikajaro_balerujur_gonovejomexu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485929/normal_5ff1cb4763306.pdfIn PDF document text
    • https://tineminelebon.weebly.com/uploads/1/3/1/6/131606156/zikifu-rerokag-bejuloso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_6023f90b3ab74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420743/normal_5fef9dd148719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_60436b0b58983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_601867afd734e.pdfIn PDF document text
    • https://moremutinujiti.weebly.com/uploads/1/3/4/8/134865562/1843209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_60359985343c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_6020a837876b7.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/4d39e5ae-8c32-4be6-8ac8-241308057b73/the_expanse_season_4_recap_episode_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1639f710-55bb-4549-abf5-c42e1f256698/what_is_tree_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51fe5c9-1ec1-4f2b-b267-b7be2262150d/27267104292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf411aba-8df6-4727-9e78-1f119816d88e/how_to_fix_cpu_water_cooler_leaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84ad9b1-ff20-4f74-af5a-2c0e8d0de3f1/firestick_steve_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d9e587-b642-4c34-b4c6-ea5a7a6add0c/la_la_land_kind_cafe_dallas_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dfaa3d6-c093-4ab0-9692-189fc3404858/hot_spot_spa_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc02fb4-b9b2-4587-a367-fb68569853b3/97910038010.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 5436 bytes
SHA-256: 68f1b3afa2bdda899fe9a4a197ec5054fb83b220e8c1414da5eac7c6bc4a337d
font_01_sfnt_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 10484 bytes
SHA-256: d980e388784f062b917ce3ee0e7e9cc222bd2938fa31379c3b63e3ba0d0e3323

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