Malicious PDF — malware analysis report

Static analysis result for SHA-256 a427447810c7ca27…

MALICIOUS

PDF

52.6 KB Created: 2020-12-04 10:35:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a96e393731a333401268828786e40f5 SHA-1: 21e68fcaa619474b0f5c733d74d4a74192b4fad2 SHA-256: a427447810c7ca275bd9949f40b5ee24226354cc28944f8a6663ffbb0a224a1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file, identified as malicious by ClamAV and an ML classifier, contains a large number of external links, suggesting a link farm or phishing attempt. The document body is heavily obfuscated, but the presence of the URL 'https://trafffe.ru/aws?utm_term=waeco+asc+1000+manual' indicates a potential lure related to a manual. No scripts were extracted, but the PDF structure itself facilitates the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8212

Heuristics 4

  • 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
  • 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://trafffe.ru/aws?utm_term=waeco+asc+1000+manual
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/3301981.pdf
    • https://cdn-cms.f-static.net/uploads/4422643/normal_5fa71be325a49.pdf
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5fbb05b07a49b.pdf
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5fa8e345e5793.pdf
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f9c44553aae9.pdf
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/robigo.pdf
    • https://uploads.strikinglycdn.com/files/fa4c512f-8d2f-4b4e-b95a-771245f8b243/hybridization_of_pf5.pdf
    • https://uploads.strikinglycdn.com/files/17a31125-e0d7-493b-911d-1a45e5033621/21_day_sugar_detox_free_download.pdf
    • https://uploads.strikinglycdn.com/files/1921a845-23d5-489d-ae6e-9c2f28a44cba/mazali.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfba79d104e5f152dc7ff/1606220713074/zte_cymbal_z-320.pdf
    • https://uploads.strikinglycdn.com/files/29de44c3-1618-44f9-b42c-633c4d6d4ba5/portadas_para_trabajos_universitarios_word.pdf
    • https://uploads.strikinglycdn.com/files/96ad619b-8b56-45da-93c8-d6ddca050bc8/sun_dolphin_excursion_10_mods.pdf
    • https://uploads.strikinglycdn.com/files/d00fadd2-0e6d-4159-b3b7-111a4e7ae082/common_value_auction.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf21a79c08c7f2b9dbe26/1606218267831/55282949960.pdf
    • https://uploads.strikinglycdn.com/files/14736eef-b784-4b63-8f15-8ce78970fd94/convert_from_to_visio.pdf
    • https://s3.amazonaws.com/tipakalif/nuxubusosakajutisoxikirip.pdf

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