Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b521d631f8f19d…

MALICIOUS

PDF

49.2 KB Created: 2020-11-30 13:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7dc2bbc97e67ffc947f11481d3fcaac SHA-1: 0d559bde20be7aabec48f42cdf2422c3489ca13e SHA-256: b3b521d631f8f19df3b5badddde68ffe2d15069c7f7f7d2dbac82297c62be6ef
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 embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a typical phishing setup where a screenshot hides a malicious link. The primary URL, 'https://trafftec.ru/strik?utm_term=root+android+apk+2020', suggests a potential attempt to lure users into downloading malicious software, possibly related to Android applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6307

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 49 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://trafftec.ru/strik?utm_term=root+android+apk+2020
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8a25b0e1876.pdf
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/kirimib.pdf
    • https://guxedujigizos.weebly.com/uploads/1/3/4/7/134735137/puxuxewul.pdf
    • https://getomipo.weebly.com/uploads/1/3/4/4/134403721/6716426.pdf
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5fa04d5b244e8.pdf
    • https://tibesegekor.weebly.com/uploads/1/3/4/4/134495245/4228320.pdf
    • https://uploads.strikinglycdn.com/files/25049a68-54be-4503-a5ab-03f8b3225fda/insta_liker_apk_free.pdf
    • https://uploads.strikinglycdn.com/files/5061a2e4-427b-47e4-8717-b2bed72f26bc/darker_than_black_season_1_episode_1_english_dub_youtube.pdf
    • https://uploads.strikinglycdn.com/files/c0bec6fe-4b49-488b-8dc9-dbc3440ed7d9/75203934967.pdf
    • https://uploads.strikinglycdn.com/files/0b544053-1cd2-4780-9446-9e5ee4793752/jikiremo.pdf
    • https://static1.squarespace.com/static/5fc07d836b97992eb55a0df7/t/5fc1e5fe4f98375720249807/1606542848846/51833430732.pdf

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