Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a6392e9e2e066c…

MALICIOUS

PDF

78.8 KB Created: 2021-03-18 21:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0285169f98b86c6b7caf7dfaa6ebb0a3 SHA-1: 49bc1582638e93585d7042108691aeb9ffb69e86 SHA-256: 38a6392e9e2e066cb81cf9de777e6a65c1152afec0a6eb17d5b4f62aab54cbe2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with a primary one pointing to 'https://ponafet.ru/wix?keyword=woodcutting+guide+osrs+f2p', suggesting a phishing or malware distribution lure. The document's structure and embedded links indicate it functions as a link farm, likely to redirect users to malicious sites.

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 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/wix?keyword=woodcutting+guide+osrs+f2p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387566/normal_602a0c3e5335f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_60299bb41e483.pdfIn PDF document text
    • http://montana-media.com/8255814463148l2m.pdfIn PDF document text
    • http://matroskin.space/36220772779i2yp7.pdfIn PDF document text
    • http://okrasote.info/85018800858m37zc.pdfIn PDF document text
    • http://opticsystem.website/serobekejbahva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_603a19d87e6f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_602459b99152b.pdfIn PDF document text
    • https://cdn.sqhk.co/liwifetil/f8piiB1/70240152307.pdfIn PDF document text
    • http://trastqort.online/spherical_trigonometry_problems_with_solutions6vlh8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_602cee675e68e.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/dgiON5J/37146441161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_e7135a65f45141d1b5b8d65e99dfc6bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7538fd-4ff5-4871-852e-d9bd2f796bb3/98650585494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a3ec75-e17b-4f7b-aeb0-1c75e4ea6232/14686389492.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/nulagilibu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/ielts_speaking_sample_answers_band_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0725327b-a623-4cb4-9ce2-5ebee1eb5412/mopunuvewikemiworiw.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_b5507baf187242bda72a38479ff9c433.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_b53986ac95314ee180a2d7ae607c0f8d.pdf?index=trueIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_2c4ad4fa44f645e18927799485122e38.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_e5cca99e97a84a97adf80f99207cda77.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 5228 bytes
SHA-256: d53b2e08b6a33a7e2df76abcffe5f14d90a227b05f75aff24fbf96e0464afd0c
font_01_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 10744 bytes
SHA-256: 3c4359d68e5e26a5ad3d5c495248da4ec3f1866541ce266faca4c8a8045f21e9

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