Malicious PDF — malware analysis report

Static analysis result for SHA-256 55fa0e97d613a291…

MALICIOUS

PDF

44.3 KB Created: 2021-07-20 07:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b0f8a032987c23e851535f1f3498620 SHA-1: 5af57aa93889837da91ceab7efcb5fcd18b55f9e SHA-256: 55fa0e97d613a2913065b8657f0cff68c1eeda60591e49b958ce0dd3b8a3121a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure with an embedded image and action trigger. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

Heuristics 6

  • 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 44 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://zuche0551.com/upload/file/69243183255.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9ab72d380312a6c8ad31047335fc6ffb/76283900921.pdf
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/nizopamerogigenoba.pdf
    • http://bukharaatlanta.com/sites/default/files/file/24632178076.pdf
    • https://petrovsky14.ru/docs/files/pefaxurafizodaxuladokex.pdf
    • http://movitecnic.com/ressource/site-image/files/61235657044.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789e7b01ef6---bigiguvowuwemilexofoga.pdf
    • http://ecohost.ru/pics/images/file/lafozodiw.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/xevonugesa.pdf
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/wixolivezig.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/fc758cd91e53c78f77e2e42ad02a9409/60257679002.pdf
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/70924051051.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/32e53e9427a42246651dce3197a53c69/ruwavag.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/suzaxevujatotuwekexi.pdf
    • http://esthebel.de/userfiles/file/jalupaxilivib.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609819bfee85a---71951773219.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/369ac535334cb57b033a21d53233499a/ziwumurexuduguje.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c7614768c---45521856769.pdf
    • http://inse.us/uploads/images//files/zirobeze.pdf
    • https://afmiletisim.com/resimler/files/74323344654.pdf
    • http://b-solutions.net/userfiles/file/97300106801.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d9660ea442bb72be3266bc8c6aaba59f/40050290653.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607135cee81b7---zilesupofibut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=business+operations+manual+example

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