Malicious PDF — malware analysis report

Static analysis result for SHA-256 a541f0c3010935d9…

MALICIOUS

PDF

52.6 KB Created: 2020-11-23 03:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1656f18ef303c77b056ac05dc6a9e2d SHA-1: 1ffae597e11632db273f9d5519ff20b322565192 SHA-256: a541f0c3010935d9b25448b2549c7742ef5fe5536e858ccaf3d291a77c55de75
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and a clickable action, typical of a screenshot disguised as a document. It contains multiple external links, including one pointing to 'trafficel.ru', suggesting a phishing or malware distribution attempt. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6791

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 52 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://trafficel.ru/aws?utm_term=browser+not+working+android+after+update
    • https://cdn-cms.f-static.net/uploads/4454561/normal_5fbb02c5dcdcf.pdf
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5fa593d3d3568.pdf
    • https://cdn-cms.f-static.net/uploads/4411270/normal_5fa0f82005076.pdf
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8fbd4ad011f.pdf
    • https://cdn-cms.f-static.net/uploads/4416796/normal_5fbaf817749e3.pdf
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/7be864e.pdf
    • https://cdn-cms.f-static.net/uploads/4412902/normal_5fb52713282bc.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f491a6777.pdf
    • https://s3.amazonaws.com/tevomenil/best_websites_for_south_indian_movie.pdf
    • https://uploads.strikinglycdn.com/files/2e91a0fd-ba09-4f16-8242-489852f2e95b/54502689550.pdf
    • https://uploads.strikinglycdn.com/files/93a1fa5c-785a-429e-a555-d137980567a0/muluwuxitujajerot.pdf
    • https://uploads.strikinglycdn.com/files/3cd69c89-1dd0-4d8c-9453-456ead96305d/64989120033.pdf
    • https://uploads.strikinglycdn.com/files/f5d5caa0-f118-408f-8ffd-4513178abccf/kiwovumilurilajo.pdf

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