Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec891e2e2f21810d…

MALICIOUS

PDF

48.8 KB Created: 2021-10-05 00:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c2079b79d84948abb6dfcc56aa20afad SHA-1: cb6d46526bf10292c666e83dc653135f7886e708 SHA-256: ec891e2e2f21810d8501c5b3331a024b079bbcae2bb4c22b9a0891d15cdbace5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to PDF files on various domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the PDF as a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6843

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://midesignvn.com/uploads/files/77689615151.pdf In PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210913_52062D2100F85316.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/61906647385.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/suvudapuletelirup.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/lomuxezi.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/57470108036.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/31502726826.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/75716409945.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/rorebinezepifogebifu.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/muwefofomotizixafu.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7jleao6mgtm8vtmnh20s26bhp3/jisin.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/zesalijojakilubufupuku.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/kumeludazuvaput.pdfIn PDF document text
    • https://pellevah.com/upload/files/gagajom.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/89905991449.pdfIn PDF document text
    • http://pfollowers.com/ci/userfiles/files/70567745746.pdfIn PDF document text
    • https://web-dev.ethioapp.com/websites/lightyearsahead/code/userfiles/files/disopegipevavozudoziragu.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/jeludejebobokaleweza.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/vinupubafape.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/6575630543.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/88466731444.pdfIn PDF document text
    • https://ilo.tasksplan.com/userfiles/files/lolagibinitadixuzix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=rose+plant+dying+after+repottingPDF link annotation