Malicious PDF — malware analysis report

Static analysis result for SHA-256 0020f841ddad669c…

MALICIOUS

PDF

66.1 KB Created: 2021-03-25 16:18:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 422abfd0e3c2d0f7a655bdd968775325 SHA-1: 8fd733ebfddad7d34fee9a92c7622f5448beee95 SHA-256: 0020f841ddad669c5c1f53ec2735a524e17f0a5f2c3c914fddd453bb6a04906a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are hosted on disposable domains and appear to be part of a link farm. The document's content, including the title 'Smith and wesson 4506 owners manual', suggests a lure to attract users searching for specific information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO-based phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://nipisod.ru/wix?keyword=smith+and+wesson+4506+owners+manual PDF link annotation
    • https://luvijitakum.weebly.com/uploads/1/3/4/6/134685142/2183869.pdfIn PDF document text
    • https://napopetonepew.weebly.com/uploads/1/3/1/1/131164038/5550466.pdfIn PDF document text
    • https://sugelazo.weebly.com/uploads/1/3/4/7/134767002/zonegarokikefito.pdfIn PDF document text
    • https://wofefuveti.weebly.com/uploads/1/3/4/3/134348775/tijosuvuxufuxa.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/jozexov_safogazene_gasevig.pdfIn PDF document text
    • https://kejuzeke.weebly.com/uploads/1/3/4/4/134456394/3427445.pdfIn PDF document text
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/xadaxejof.pdfIn PDF document text
    • http://invitesistem.ru/zajemizonelobovapu3cueh.pdfIn PDF document text
    • http://usechambre.xyz/6547863058101xwq.pdfIn PDF document text
    • http://trokot-newshop.online/python_programming_on_win32tua93.pdfIn PDF document text
    • https://sobomimaseneke.weebly.com/uploads/1/3/1/3/131379860/jozeliw_taritar_fifel_fawaxavova.pdfIn PDF document text
    • http://madewithsunshine.com/alachua_county_school_calendar3dmr5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_fa11610664cf4dd292e0b00af29be94c.pdf?index=trueIn PDF document text
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_47a9eae3f5b94ae2a1d7b460181f0a17.pdf?index=trueIn PDF document text
    • https://d5775bf3-09eb-4776-b235-d2f4d703d790.filesusr.com/ugd/205ae4_abb33d75b3464173959970daa8ac98e4.pdf?index=trueIn PDF document text
    • http://pimimozoji.myartsonline.com/2318949221.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_6ddbf7a4162b4db7a1b5c8c96e4b250b.pdf?index=trueIn PDF document text
    • http://bukezodebas.onlinewebshop.net/30184808732.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_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 5768 bytes
SHA-256: bfba038587ef442c9d5f32f4713e7b27915672b442f6c3c5bf363348ce7be72e
font_01_sfnt_off0000d82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82C 10340 bytes
SHA-256: 354896a41c37bf1da9ab04252c240e57e2b4532d8ac083b8f03d877f0b286b19

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