Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9fa46679213f47…

MALICIOUS

PDF

63.5 KB Created: 2021-05-11 01:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: caf687ab55c40cb416dc972899969a03 SHA-1: 830ab371854d5052d493df9f4759ba40e84669ea SHA-256: 7b9fa46679213f476ba7936853d45291e4d87e828c7d5ea67e9b972ed002f02f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8105

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.
  • 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
  • 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://gimoguvi.ru/strik?utm_term=vsepr+theory+molecules+with+lone+pairs+worksheet+answers PDF link annotation
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/sipupagudijaji-jokazep-tazubapexoku-kepodomug.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/fagakezikasefewuv.pdfIn PDF document text
    • http://kutivefivugokev.mypressonline.com/defogux.pdfIn PDF document text
    • https://wilubiluzitewi.weebly.com/uploads/1/3/1/4/131413550/lufevufitaluf.pdfIn PDF document text
    • https://cdn.sqhk.co/paxabuxutujo/fxja4hU/shipwreck_grill_point.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/bjjUN5s/woxeruxavixevuwevotelepij.pdfIn PDF document text
    • https://cdn.sqhk.co/remavaveso/hgchadh/71914933057.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/mghDid5/90673715160.pdfIn PDF document text
    • https://cdn.sqhk.co/dokederajo/eii54ih/bowmasters_free_characters.pdfIn PDF document text
    • http://kidulukapaxarej.iblogger.org/bolt_and_nut_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/fAihMkl/1507050067.pdfIn PDF document text
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/237fe.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/ijIhaGn/2884523202.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/gifggjf/best_portrait_camera_for_android_phone.pdfIn PDF document text
    • http://jorixoxogud.epizy.com/rogidetifesukelasos.pdfIn PDF document text
    • http://gekasudevij.epizy.com/67388437861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b4d49b-232b-4364-906b-3844105d48fd/how_to_make_a_fake_bookcase_door.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/82738515449.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/50893079649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada81ee2-086e-4534-991d-1b402b715898/70604882244.pdfIn PDF document text
    • http://xupopav.epizy.com/google_classroom_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff5155c-f12e-4161-9469-126266c4f420/irrational_numbers_math_proof_definition.pdfIn PDF document text
    • http://renepipelusibav.rf.gd/ferret_diet_guide.pdfIn PDF document text

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