Malicious PDF — malware analysis report

Static analysis result for SHA-256 755adaf783fb64f9…

MALICIOUS

PDF

66.6 KB Created: 2021-01-24 02:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f5f3c315374fea43a296f80814e72bce SHA-1: ea0e4a7b04c67f49bcc235d97f71c7c535bacc6e SHA-256: 755adaf783fb64f9bfa9ddab298cca3153aafb63a188eea9cd49e86ab2863672
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'druttle.ru', which is likely part of a malicious link farm or phishing campaign. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/aws?utm_term=android+cyanogenmod+7.+1 PDF link annotation
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    • https://xivapumi.weebly.com/uploads/1/3/1/6/131606059/vudefogo.pdfIn PDF document text
    • https://site-1178057.mozfiles.com/files/1178057/stickman_battle_game_free_fighting_stickman_games.pdfIn PDF document text
    • https://zazafiwizodizi.weebly.com/uploads/1/3/4/0/134041258/1cf39b2b0.pdfIn PDF document text
    • https://site-1253815.mozfiles.com/files/1253815/wurajuga.pdfIn PDF document text
    • https://site-1168511.mozfiles.com/files/1168511/cookie_recipes_without_eggs_and_brown_sugar.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/answer_to_today_s_jumble_words.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/fifth_grade_multiplying_fractions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/gotogusikururis.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/dushman_movie_mp4_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/apple_reset_security_questions_insufficient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/wivukami.pdfIn PDF document text
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