Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abe1a5d42953894…

MALICIOUS

PDF

71.3 KB Created: 2021-02-25 14:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de88c60613dd79bef335635df28dc884 SHA-1: 97179b638ce6e6a5608614ea96c90a898362ce1b SHA-256: 4abe1a5d42953894c87ffb6e8069a3f409357e77a3cfc1621b9bbc15f90964f8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=fire+and+ice+tahoe+price PDF link annotation
    • http://com-signto2.xyz/island_in_the_sun_chords1g124.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/zumakazodefate.pdfIn PDF document text
    • http://betmoy56.com/godfather_of_harlem7z2x3.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/hhiGijn/hang_glider_with_engine.pdfIn PDF document text
    • http://unreguezff.rest/dizobefqb5e.pdfIn PDF document text
    • http://smartcreditscore.info/brother_ce_4000_manualbrpgn.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/hddihhg/big_city_life_simulator_pro.pdfIn PDF document text
    • http://ayazshabutdinov.club/yamaha_rx-v679_service_manualc55fn.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/aGajdid/electrical_schematics_symbols.pdfIn PDF document text
    • http://erethiztzj.space/heng_long_m1a2_abrams_manual210ot.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/bexalubinalal.pdfIn PDF document text
    • http://manybigs.space/recurso_de_inconformidad_del_imssss2a5.pdfIn PDF document text
    • https://regivuno.weebly.com/uploads/1/3/1/0/131070843/7e9d8.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/3793858.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/dihnhdd/top_10_world_war_games.pdfIn PDF document text
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/079f1fbd848c136.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/gdjaW8x/28377558362.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigukesege.epizy.com/xaxejadibinisulunitelo.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

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_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 4908 bytes
SHA-256: 043e7a076ab49f1f6652c1b154caa83bb0790e00517632422c9faeb61009322b
font_01_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 11196 bytes
SHA-256: f0f8ea06ade57da96ff5f5c89d1b46926ee8f42c6673d51829407d61b16a284f

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