Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42b22daafe1d395…

MALICIOUS

PDF

44.3 KB Created: 2021-09-05 13:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2962427122fad30db50a2139531645c2 SHA-1: 690ee467e8cc22327c5ecb57e3d3b078152bfbe2 SHA-256: d42b22daafe1d395dc5c3192c40c0c1e75f87792f49ecf97e8f6ca215819c8e3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file employs a common phishing lure technique, presenting itself as an image-only document to conceal a clickable link. The numerous embedded URLs, many pointing to compromised CMS uploads, suggest an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 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 https://archism.ru/uplcv?utm_term=social+meaning+of+money+pdf
    • http://chinamakina.com/userfiles/file/moporugiperunirugoritor.pdf
    • http://sk-uralstroy.ru/uploads/files/govulopo.pdf
    • http://group-anons.ru/userfiles/files/66348968111.pdf
    • http://bk-plus.at/userfiles/files/fitogadotadis.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/ae444387b33530287dd3708dde71a742/waxaxowijofuxerumogojaka.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f4f3ccc90---gazibiziwux.pdf
    • http://quaint-house.com/images/blog//file/lolakopunavubup.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c205073d988---7914294358.pdf
    • http://krupongs.com//images/file/powizowejowire.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/161026e900013b---dorojifakigaxeton.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072814d61435---9629128284.pdf
    • http://monkey-do.net/userfiles/file/peleduzexalivu.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3155e0e20f---84141344139.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/simoseva.pdf
    • http://ji-tien.com/userfiles/file/rabevojiwevadifiluf.pdf
    • https://hr-serdahel.hu/images/file/44128416956.pdf
    • http://tai-yang.tw/taiyang/upload/file/12683459468.pdf
    • https://autoparkalbanese.it/file/89782145866.pdf
    • http://akifkasaboglu.com/esatfisek/images_upload/files/29951163144.pdf
    • http://joltiy.ru/uploads/files/xenovigu.pdf
    • https://anukulagrotech.com/userfiles/file/63875646256.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/62610b5fb63a2bd25fe6444515d19edb/82287506717.pdf
    • http://cortabellanews.com/userimages/gizusobon.pdf
    • http://kemenyseprosiklos.hu/upload/file/41699833632.pdf

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