Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09a6d9429b69b44…

MALICIOUS

PDF

80.7 KB Created: 2021-04-05 09:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e0d3fcde9f324d16c85b6c993d9a9c3e SHA-1: 240550a0832fe5ac0164b41a06458a78718c8919 SHA-256: a09a6d9429b69b44b4f4906fb7a3e9ced4a39c4504ddb241cb5e20c2347fcb61
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One primary URL, https://lozipotod.ru/strik?utm_term=what+is+project+scope+management, is present and likely serves as the malicious payload or phishing destination. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=what+is+project+scope+management PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369783/normal_601daaaae7f61.pdfIn PDF document text
    • http://teaitalis.space/43577145669mpz40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_602d2a985a4b8.pdfIn PDF document text
    • http://luminar4-download.xyz/35818972923f8tkz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_601bd2ccbb41f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_6c8d912a898646ec865ac0bc51ba93b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/dream_interpretation_islam_book.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_17146bb52ee842c89fd929ab29a986ac.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_52ba11caf38a482b8215a63b97da98a3.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_3dc3c461dcab4e3d83e885ff242a53a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcf257f-d20d-4000-a6ae-138c4d7f0901/dcs_930l_default_username_password.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/what_courses_do_you_need_to_be_a_real_estate_agent.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/xerepovirotinisuwawaj.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_8822cb79c2f04ac0b6a69cbe4a15114b.pdf?index=trueIn PDF document text
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_e59ddf589c124dbb9a244b38632aa6a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/chilton_auto_repair_manuals_free_online.pdfIn PDF document text
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_f524f61b3b7f4765a58948ae826ee73b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8c3f02-1d39-4314-a313-33abed1c34a5/57341077621.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_7a165f572d6945fb8c428fd49a219deb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c52c45d-148b-4b96-94e8-97bb6e70291e/what_is_the_healthiest_bagel_at_einsteins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f52083-2ffc-484d-8a54-0837727dbbe1/law_of_sines_and_cosines_quiz.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_off0000ff3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3F 5404 bytes
SHA-256: 231827e06e05cc1a5755e6e0991fc3a8c60f1a15da83055878a7253deb9ccfff
font_01_sfnt_off00011188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 10632 bytes
SHA-256: f147ec191f402e2e57e4319f6128a590098e66b92a85c1e6f3ed63abce1e5209

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