Malicious PDF — malware analysis report

Static analysis result for SHA-256 5364036ef1347b4c…

MALICIOUS

PDF

67.8 KB Created: 2021-03-09 01:15:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ae37d75c51fb27cc1532d1a7445c1f9c SHA-1: b7e6e307ecbd0128c840017a19161a1d59610e76 SHA-256: 5364036ef1347b4cfa3ca68abe257d96bcade36d1d88cf4946634ebb754387e9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a disguised attempt to redirect users to external sites, likely for credential harvesting or malware distribution.

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://jumiwimov.ru/wix?keyword=inverse+functions+practice+worksheet PDF link annotation
    • https://cdn.sqhk.co/lafugafeniki/ahi5he7/29752201456.pdfIn PDF document text
    • https://cdn.sqhk.co/betarudigi/bAgejge/bosirajulupevor.pdfIn PDF document text
    • http://mekatososa.iblogger.org/chess.com_puzzle_rush_rating.pdfIn PDF document text
    • http://bonusiotsbera.online/58999103332sq9ac.pdfIn PDF document text
    • http://odemebayisitrafik.com/c_t_studd_biographylnd0g.pdfIn PDF document text
    • http://bet-info.ru/95585682385dum9x.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/bgiKeQx/tujanoribaneleruxi.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/dichbja/fleet_combat_training_center_atlantic_dam_neck.pdfIn PDF document text
    • http://bonus332.site/body_ritual_of_the_nacirema_analysisa1oei.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzazodigeza.epizy.com/10301520268.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_15ffdc8914c74d37b88b9868ed5968b0.pdf?index=trueIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_ea659dd22803443fb51e170b3bf77146.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvetaso/excel_vba_application._worksheetfunction._counta.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/sebipiwunatum.pdfIn PDF document text
    • http://wasamatebupo.rf.gd/thom_hogan_d500.pdfIn PDF document text
    • http://fadepuluweg.rf.gd/33140411199.pdfIn PDF document text
    • http://famutiparuzot.epizy.com/24095642368.pdfIn PDF document text
    • http://veluvuwipigunuw.rf.gd/chapter_1_thesis_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/how_to_reset_my_vizio_tv_to_factory_settings.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_527e1eef0b07449c97ef0d1387201c7f.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 5224 bytes
SHA-256: 13c811c879404b1331a5a82c1a9a52f9f17f974af9c3218ed7f402bec9f26e26
font_01_sfnt_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 10192 bytes
SHA-256: 03ae2ac2d6718e2f326ea7dc4c058aaada908e0ec6f46ca32e32ab204f0419ab

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