Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9c748dd0916537…

MALICIOUS

PDF

59.9 KB Created: 2021-03-15 00:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d1922f5bea05f53a038a8b286a361cf SHA-1: b3a7ac706da9158fef2d7a825adf86f48708a5ee SHA-256: 4a9c748dd0916537c353d129bd4ddbad2df0b96cbfe30fdf3eb00331385984f4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, designed to trick users into clicking embedded links. Multiple heuristics indicate a link farm structure, with numerous external PDF links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6893

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 59 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://baarspo.ru/award?keyword=banking+awareness+capsule+for+sbi+clerk+2020+pdf
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/a78de.pdf
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/2453762.pdf
    • http://idealslimitalia-official.site/70158665213wxolu.pdf
    • https://nuduvoto.weebly.com/uploads/1/3/4/5/134589614/2b6e6ce033e851.pdf
    • http://collegegraduatecentraldating.com/574854215227mwir.pdf
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/6489081.pdf
    • https://gukilebulasule.weebly.com/uploads/1/3/2/6/132682884/1506164.pdf
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/29b1f0692b.pdf
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/zurin_gonifiwivorevem.pdf
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/751357.pdf
    • https://kanogafab.weebly.com/uploads/1/3/4/8/134899054/makusovidadoramumo.pdf
    • https://s3.amazonaws.com/libeganot/manualidades_botellas_de_plastico_reciclado.pdf
    • https://s3.amazonaws.com/fofeguj/41607691542.pdf
    • https://s3.amazonaws.com/veraxawewib/agreement_paper.pdf
    • https://s3.amazonaws.com/rupatojuko/75664207916.pdf
    • https://s3.amazonaws.com/zesotat/systematic_theology_volume_1.pdf
    • https://s3.amazonaws.com/sizabo/anticholinergic_poisoning.pdf
    • https://s3.amazonaws.com/nitidadufetenu/hungry_shark_world_heroes_mod_apk.pdf

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