Malicious PDF — malware analysis report

Static analysis result for SHA-256 594ca187eff480c1…

MALICIOUS

PDF

80.4 KB Created: 2021-03-27 21:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 940fbd0aa84b76b23cc606913f66a19b SHA-1: 90b4126373fcc8ac13517d2b1bc4dade27292ec2 SHA-256: 594ca187eff480c14dc3a323ed1370117b06c3da2a2c8855013fe1953efe366a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://seumenha.ru/strik?utm_term=weight+lifting+plans+pdf, which is likely used to redirect users to a malicious site. The document's structure and the presence of numerous external links indicate a tactic to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=weight+lifting+plans+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447089/normal_6036b70355556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_605272bd5a007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_603364c90a099.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fd0650b2c572.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502920/normal_5fec817ce494c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_63f0cbdefbf2475f9fb65521e279f2c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/taurus_g2c_extended_magazine_clear.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_24c0fe312ed74c138d18be8ba7debe97.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_eb35ecf8b9ab4c81a5eccc3b5bb4e494.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/16529000128.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/2012_dse_econ_mc_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/mendelian_genetics_multiple_choice_questions_with_answers.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_0ff0dc05c25049d4aa566a6678f55457.pdf?index=trueIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_00d41f9a5d5c450fa48b57c7d6f84654.pdf?index=trueIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_9a45d61802c44630b11b41065fb5f203.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_6e442d4d090a4b579a1cdcebff485cd8.pdf?index=trueIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_a7bd7bbbab6e44b695ff27841a52b7fe.pdf?index=trueIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_758ff5f260464c1db301e24454722694.pdf?index=trueIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_b720180ebc374c378486e2a7ff4365ec.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_5502f209ea154c8995a7466c63b86806.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geradi/vatewureravakako.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_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 5220 bytes
SHA-256: e121c1a1d79f12fff679aa34af4415d4209d63c1b9d11ed31a7f2c2314b476cd
font_01_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 11836 bytes
SHA-256: 754950ef9420c651fb3509125e04b3b91259dcbb8b03810179aaf27277c623bf

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