Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4cc5fe3c5a0db3…

MALICIOUS

PDF

84.3 KB Created: 2021-04-04 13:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f24e7462ba69bd8fddb22b47a0e01fe SHA-1: 9af957729ad2712d4e71feabe74cc5113ba4da1e SHA-256: ac4cc5fe3c5a0db3df1bfbc8fbb7c42753bd4f28e7324422908fbf3dcd246a41
94 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and one specifically links to a URL designed to mimic a search result. The ClamAV heuristic identifies it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4287

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 https://golowaki.ru/award?keyword=clipsal+saturn+zen+pdf
    • https://cdn-cms.f-static.net/uploads/4505102/normal_60506635d9c92.pdf
    • https://gefatute.weebly.com/uploads/1/3/5/3/135345711/8502740.pdf
    • https://cdn.sqhk.co/gujowaxexag/cjajjh0/4_pics_1_word_cheat_all_answers_apk.pdf
    • https://cdn.sqhk.co/woguwubege/ifiegfi/27530040359.pdf
    • https://static.s123-cdn-static.com/uploads/4380883/normal_5ff9d0baed6c1.pdf
    • http://vigirorimikana.medianewsonline.com/revenue_recognition_ind_as.pdf
    • http://sigixexizo.sportsontheweb.net/31582349876.pdf
    • http://kovativegapok.getenjoyment.net/32989088963.pdf
    • https://pepakulal.weebly.com/uploads/1/3/4/8/134885681/6f57d931d6144d.pdf
    • http://mugukix.mygamesonline.org/lebinukis.pdf
    • http://xuvavarapegu.mywebcommunity.org/15694871563.pdf
    • https://tugojomabam.weebly.com/uploads/1/3/4/5/134588125/5c62cc1e.pdf
    • https://cdn-cms.f-static.net/uploads/4386849/normal_6047bcb3799a5.pdf
    • https://cdn-cms.f-static.net/uploads/4367916/normal_60605e3b0de26.pdf
    • http://rolopigabetitu.scienceontheweb.net/7935377277.pdf
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/1958253.pdf
    • https://dubuzimonovox.weebly.com/uploads/1/3/4/3/134347386/rizuxigukezig_modefogofozadom_lomenupakafuri_tikiju.pdf
    • https://cdn-cms.f-static.net/uploads/4416512/normal_602270e27c8ff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tugabijenovili/vigikujet.pdf
    • http://benamow.myartsonline.com/roland_tr-808_user_manual.pdf
    • http://zotubune.myartsonline.com/70532321341.pdf
    • http://gefuwaw.atwebpages.com/que_es_psicologia_educativa.pdf
    • https://s3.amazonaws.com/napejaxosinages/brain_damage_game_guide.pdf
    • https://s3.amazonaws.com/pokixovuxik/64726411024.pdf
    • http://matewedidoxeber.onlinewebshop.net/1966484003.pdf
    • https://s3.amazonaws.com/wexukufedepim/24369337759.pdf
    • https://s3.amazonaws.com/fezenur/pizuzinug.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014226.bin
b6438251688ad38e13a2f8431a8ac6fb829c5efacdb40ee72d983beec6baf150
pdf-font-stream PDF embedded font (sfnt) at offset 0x14226 4988 bytes