Malicious PDF — malware analysis report

Static analysis result for SHA-256 486b4fc92e549742…

MALICIOUS

PDF

37.6 KB Created: 2021-01-03 12:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d5fb7ba14529a0d4f945993bce65412 SHA-1: b587f88b45cdf9f9a596e96dc8c02cda6a9010df SHA-256: 486b4fc92e549742074105534385c0ec34915a4027563dae325a056a9619fa11
232 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, utilizing an image-based design with a clickable action to redirect users to malicious infrastructure. The presence of multiple external PDF links, including one pointing to a known malicious redirector, strongly suggests an intent to distribute further malicious content or conduct phishing. The ML classifier and ClamAV detection further corroborate its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9258

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://traffmen.ru/aws?utm_term=sum+and+difference+of+cubes+practice+worksheet
    • https://ximewenidurap.weebly.com/uploads/1/3/4/6/134651426/5171c98d.pdf
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5fa053b562962.pdf
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5fa48e81292ce.pdf
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5fbc20ea9111b.pdf
    • https://static.s123-cdn-static.com/uploads/4379731/normal_5fe18d1dbe8c1.pdf
    • https://static.s123-cdn-static.com/uploads/4495271/normal_5fc83e7f05711.pdf
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fad77fa8bcb7.pdf
    • https://static.s123-cdn-static.com/uploads/4426551/normal_5fce4de8ae088.pdf
    • https://uploads.strikinglycdn.com/files/105b4121-d796-40a5-a744-06121a0a7093/48403555819.pdf
    • https://uploads.strikinglycdn.com/files/ebe9

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