Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae6c41a199b96b4…

MALICIOUS

PDF

68.5 KB Created: 2021-08-01 22:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c3e4e1282a1d0008c3a031eebf3158d9 SHA-1: 9bcd5b6c784a0278130f7465bb39439cf92f2b22 SHA-256: 9ae6c41a199b96b4a4044f2c6c95dd2547a831f98da2ee67bfedd78d2c4ad4ee
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm with numerous external URLs, many pointing to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malicious redirection intent. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a67036d3dbaf7422defb57019bc5ad1c/60044363429.pdf In PDF document text
    • https://aawyx.com/sites/default/imageuser/file/70065510158.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/vuxurenoxamarunub.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/99527893129.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105290334.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/lipanipoxulojiwurizexatux.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2a608526---nonisemoxigikejonixaz.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/69c09e1efe287b730366dc120de7cc4f/80207682767.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/84145001869.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/gusaxiziza.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/65845081026.pdfIn PDF document text
    • http://18554080.com/userfiles/file/43518186149.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/jededixejijinalemupuzeze.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8f255f50---42622945904.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/sanarimosuwo.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e16a46f63968de3c7262ef56863a263e/59899111190.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/imc4s5inbq7phiuqfrgrn52hnf/64924380838.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e94a817975---60838554123.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/2f0c5696c8213fb2b9aada7874a5e5cb/virafe.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/gerojiruja.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdff83ee9e---lifokekaputelenajeligo.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/5jt8rjt83247etac5pbimfc4q6/62089814302.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/2d4dd980695a849314d09f7bde3ca191/jevefurizubupupegikipeb.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/raposularewek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+position+hand+on+pianoPDF link annotation

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