Malicious PDF — malware analysis report

Static analysis result for SHA-256 8929117e2c28528a…

MALICIOUS

PDF

55.5 KB Created: 2021-09-12 20:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4c5d1b58183a042232f365309c3842d5 SHA-1: 1f94ef35fb111bbfcf070427082429004d5c9058 SHA-256: 8929117e2c28528a4ca679a27fcd60693ba081f3a273f677a4f154f8ef6d8f2c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or inflate search engine rankings for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://unitjaya.com/contents/files/rajadefebimagimixajebut.pdf In PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zajokimorotis.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/viwonipamedaj.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/wuworukuwepomefi.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/tijamowifusiz.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/35417796378.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/450790852.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/roremotusowajitejimofoki.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/49557312432.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/22119854622.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/77099275766.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/pedisepa.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/pivagunesatitaroxu.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/34047498148.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/zomasuzuzotivepem.pdfIn PDF document text
    • http://eternaseguros.net/files/files/22465492300.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136daa50d38d---77941479865.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/5298052639.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/wumuw.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/62963471392.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/24578741010.pdfIn PDF document text
    • http://yljczl.com/uploadfile/20210909080335450.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/medinalamuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=message+notification+but+no+message+androidPDF link annotation