Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1467c8b63557273…

MALICIOUS

PDF

82.9 KB Created: 2021-05-24 01:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d5796f1651fb5770815f32ecd348475 SHA-1: 59ca73066259f57e9ac0fc511f0019759d537002 SHA-256: f1467c8b6355727341f17443e7d58562d14789e4225e2144bde1a14a2c6b7a93
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/strik?utm_term=divina+commedia+canto+2+inferno+parafrasi PDF link annotation
    • https://lamipozalunem.weebly.com/uploads/1/3/5/3/135308558/mejunexuzugowa_razazuvanuwuz_xegamijiromi_vuwutotexalasew.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/kejobonuberajubito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fdc4279f0d5a.pdfIn PDF document text
    • https://tugoxovelosiju.weebly.com/uploads/1/3/0/9/130969774/df399d026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_600bba33275a7.pdfIn PDF document text
    • https://lukigozijejis.weebly.com/uploads/1/3/5/3/135398738/neforigosede-tutelopodisemu.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/zadijemewidoneked.pdfIn PDF document text
    • https://vanixegufewip.weebly.com/uploads/1/3/4/5/134511125/2600332.pdfIn PDF document text
    • https://donelodef.weebly.com/uploads/1/3/5/4/135401433/277ac548c54b.pdfIn PDF document text
    • https://jivezevovofefav.weebly.com/uploads/1/3/4/8/134896957/8543269.pdfIn PDF document text
    • https://vofodiwe.weebly.com/uploads/1/3/5/3/135350815/pelatu-wafusasi-zoxid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60199d14f41f5.pdfIn PDF document text
    • https://wawomageton.weebly.com/uploads/1/3/4/5/134584849/vezefizufatibo.pdfIn PDF document text
    • https://wumibopoz.weebly.com/uploads/1/3/4/5/134511789/5891481.pdfIn PDF document text
    • https://lurufimuzid.weebly.com/uploads/1/3/4/0/134042860/42fb0df39894.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/b417dc0c-816e-499c-a15c-917048de9871/easy_piano_chords_for_beginners_with_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c6ce9e-9fc2-4f45-add8-2874e50791af/vinavokugozosudo.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/how_many_yards_in_sport_weight_yarn.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/jotezudijasumoxefapuporux.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/quantum_dot_cellular_automata_project_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eff298f-fdcf-47be-8ba7-09d719991a0c/55313252947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275a8a99-a1f8-4716-b881-cff263a319d5/watinenagoxopodoworiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d082cf-9b85-413a-a91e-f975655017d3/butterball_xl_electric_turkey_fryer_manual.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_off00010566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 5460 bytes
SHA-256: e019e70ee6dc7668a831f07a58ae6fce1e59cb24d0b930828b9ac8851feeebe2
font_01_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 11788 bytes
SHA-256: cd7a459fa49a4a8a7e0376e49fc820f3aac853c1628dac86978601d5d033ac60