Malicious PDF — malware analysis report

Static analysis result for SHA-256 74581a434aa0f6e1…

MALICIOUS

PDF

79.7 KB Created: 2021-05-11 22:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0e328174e01dc2c11ed54a0496fcd234 SHA-1: 96854ad2069d1543a89457834a7ac28898de45e2 SHA-256: 74581a434aa0f6e1f998769bb4046c6668ce60b4fa5be8828e961fdc82db615b
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/strik?utm_term=william+blake+the+lamb+questions PDF link annotation
    • https://cdn.sqhk.co/gitopedevid/XGRa4vR/fivumuturipez.pdfIn PDF document text
    • http://gododerur.66ghz.com/13021744365.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/geiexhb/head_to_head_competition_synonyms_and_antonyms.pdfIn PDF document text
    • http://familyit.info/miraculous_ladybug_amino_engliship8iy.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/H1g64hi/woodworking_bench_for_sale_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • http://bonusiotsbera.online/vebovijirogidatofulini6e2r.pdfIn PDF document text
    • http://esagafow.fun/nabavefenipaboniponobusk1bj.pdfIn PDF document text
    • https://cdn.sqhk.co/bonirixa/8yUDhdp/angielski_w_tumaczeniach_business_2_chomikuj.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/iilrVUI/ikea_desk_organizer_shelf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/08cca6e4-8b19-444a-ad2c-53ff5308c81a/kewabavovufuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5184a6-5fe8-4130-8e8a-27cc3881c410/vodabewinozuzonuzer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e38768e-5c69-491c-b6d0-024341fd0eb4/sadunebalesuturido.pdfIn PDF document text
    • http://wigifanike.epizy.com/slaves_to_darkness_paint_schemes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe7b16e-bc4d-4d95-890a-c5dace36122e/bose_universal_remote_control_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd69d24-ed28-4487-9552-7c577ee51a11/can_you_get_your_permit_at_14_in_florida.pdfIn PDF document text
    • http://xosareregaka.epizy.com/6638387099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e0c9d7-2c05-45bc-918e-afa9a6fee62b/94502079642.pdfIn PDF document text
    • http://gogadotonirad.rf.gd/how_do_i_program_my_directv_remote_to_my_fire_stick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920fa945-46bd-4000-a4c9-b32efd3344cd/witch_trials_bible_verse.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 5052 bytes
SHA-256: fd8e523b0c444ebc47cfecd100e7d6ba1f532c9412968aa855420b9a26fbb375
font_01_sfnt_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 10304 bytes
SHA-256: 8e89de025c9f39fd776eb0d619f75b1b1641b14c6ab19296d0d2f77b4e4d34f1
font_02_sfnt_off000121e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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