Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccde20ff70d6f79…

MALICIOUS

PDF

63.7 KB Created: 2021-02-28 17:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf067367d31a453099c5587e73e23a6c SHA-1: 2d9f9850d134fb20594a40e8f12512e90f80f79d SHA-256: fccde20ff70d6f799d651b985ab0762558637c94849ba515563723ce13ea3ac5
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

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://midufefew.ru/award?keyword=truth+table+worksheet PDF link annotation
    • http://samoe-samaya.ru/lemejukoxikapafigusaver55djo.pdfIn PDF document text
    • http://gufutaca5.xyz/617878076768relt.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/auto_electrical_wiring_basics.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/vifejef.pdfIn PDF document text
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/ralovax.pdfIn PDF document text
    • http://storeeuro.info/sujobg50nc.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/sony_dream_machine_alarm_clock_radio_manual.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/1634774ccb9.pdfIn PDF document text
    • https://sujetobanep.weebly.com/uploads/1/3/5/3/135337497/2a831b5c505.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/best_125_pit_bike_engine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/how_to_reset_a_westinghouse_tv.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/mosajig.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/free_3d_wallpapers_for_android_phones.pdfIn PDF document text
    • http://jemileti.atwebpages.com/41308376081.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/bollywood_mkv_movies_sites.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/a_discovery_of_witches_season_1_episode_7_recap.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/wibuzaruz.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/eukaryotic_cell_structure_and_function_worksheet.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/63333132703.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 4744 bytes
SHA-256: 42ca4a27d24e7ecca3305e963162f0a0e3531802ea1b46d34c884b76757d8c1d

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