Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7b535e0751b412…

MALICIOUS

PDF

49.5 KB Created: 2020-11-10 01:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3e09171285428a580ad70d6d9b54cf1 SHA-1: a17b02d7c9e7c1ea0c2c09f41dc290d88f2ccbec SHA-256: cc7b535e0751b4128592b1346cffee25cf4c2a650c947bb1be1549071d06bdb5
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a single image, typical of a screenshot designed to trick users into interacting with a hidden action trigger. The document embeds multiple external URLs, including one that appears to be a search query for 'quotes about laughter is the best medicine', likely a deceptive pretext. The presence of a PDF link farm suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7011

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 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://traffnew.ru/strik?keyword=quotes+about+laughter+is+the+best+medicine
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f892c613f379.pdf
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/votawi.pdf
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5f979fbe3f847.pdf
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/dixuroxuwikom-fozazoze-kitaxuwidak-felaxabavi.pdf
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5fa0ca1e252de.pdf
    • https://s3.amazonaws.com/tadovu/dafasapanosepobobakuwum.pdf
    • https://s3.amazonaws.com/tadovu/tulepagutuf.pdf
    • https://s3.amazonaws.com/sojebelevenex/85874481437.pdf
    • https://uploads.strikinglycdn.com/files/a0051133-b208-424e-9980-def93aaebfd2/sunetuvebetewoxenazej.pdf
    • https://uploads.strikinglycdn.com/files/8b1cffad-02d8-469e-882b-494423d4e984/10369386237.pdf
    • https://uploads.strikinglycdn.com/files/cf235497-db77-45d7-b6fb-e946c2b94de5/kijeredogox.pdf
    • https://s3.amazonaws.com/dotivaf/93112185052.pdf
    • https://uploads.strikinglycdn.com/files/957104be-e91f-4084-bdb2-2d84af58af8e/pisejamef.pdf

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