Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c043dd945436fd…

MALICIOUS

PDF

77.6 KB Created: 2021-06-30 06:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8b45f6c10c54b2ba01efa49b161cad8 SHA-1: 5b5cefca48e04fe8f645ad95e5ed183c43102833 SHA-256: b7c043dd945436fdc407ddbd68c876ea01c0555a492d816c2fb99dde07986179
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF is detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains an image overlay and numerous external links, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a likely spearphishing attachment campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6633

Heuristics 6

  • 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 77 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 https://pistant.ru/uplcv?utm_term=divination+in+african+traditional+religion
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ec942e5e7083bef6b1f7cbc431a45908/17232005031.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073504c5f3b6---98334934536.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/53c82e7f5fc2b79d6f9901e90b18dd2b/rilopokukedibofufidulu.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/3h5p82ek6l857ijjgjtfcgjial/53563659943.pdf
    • https://likeevent.it/writable/public/userfiles/file/5255824316.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/10e686bd19a194c88d87480006798463/50475011037.pdf
    • http://saxonrt.hu/img/userfiles/files/97970864489.pdf
    • http://oio.cn/uploadfiles/files/52807945688.pdf
    • http://studiorinaldibedin.eu/userfiles/files/xulojikisogipoge.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/v7ejh9psbt6u0cha2ml93f2h9q/38234651167.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb6acc1d9---29214741349.pdf
    • http://school19-zav.ru/userfiles/file/67108097717.pdf
    • https://hssanesteban.cl/files/rokofazin.pdf
    • https://alakharia.com/public_html/userfiles/file/18107683966.pdf
    • https://masterjobintl.com/ckfinder/userfiles/files/jekeme.pdf
    • http://mbcasc.net/imgs/file/nurerel.pdf
    • https://autoprofi.ua/userfiles/file/42823778047.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/7jf08ss91pm2vcglm2427ok6aa/rumufepafetimowabizari.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/6ulirtsd5vb512f0vtmc0pvadd/wawuwifenunimajim.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3f0eea6c9e699c10a230414cae57ae4b/somafir.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607418cadba99---panovaluboxab.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160784e5f74d20---kumux.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ridco8ns237grf36eqpeb793pa/pizur.pdf

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