Malicious PDF — malware analysis report

Static analysis result for SHA-256 11cce883512a3fb7…

MALICIOUS

PDF

67.1 KB Created: 2021-02-02 00:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6e37537fab6989b6e2b903a190387de7 SHA-1: 24318828dcc86d214eddda56c571993220ca07e4 SHA-256: 11cce883512a3fb72ddbd3f269c3400b9569f491b5ff822c80c5421d515925bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://jacksth.ru/123?utm_term=d%2526d+first+edition+player%2527s+handbook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495042/normal_60104177062e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/gg8ijV8/mobile_payment_companies_market_share_in_world.pdfIn PDF document text
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/9ad3d900ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482009/normal_5fe56e2df2174.pdfIn PDF document text
    • http://kindraretterath.com/4691807356479fgk.pdfIn PDF document text
    • http://xtw2.club/viraxotonev1i3rf.pdfIn PDF document text
    • https://cdn.sqhk.co/juviwonu/9jdieji/second_hand_sofa_set_for_sale_in_hyderabad.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/bovujolomotebelm3xru.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/JQjf4Q9/goat_simulator_xbox_one_local_multiplayer.pdfIn PDF document text
    • http://okrasote.info/47462411631w6fq6.pdfIn PDF document text
    • https://wobipogipexiwom.weebly.com/uploads/1/3/1/0/131070125/36fda24c2e.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/jgdjdhd/free_music_downloader_app_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxupupin.epizy.com/speed_test_software_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/gasuresexafex.pdfIn PDF document text
    • http://xafafomuripag.epizy.com/54200472042.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/el_coliseo_romano_informacion_para_nios.pdfIn PDF document text
    • http://jafesok.epizy.com/83015579919.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_off0000c2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F1 4156 bytes
SHA-256: 5bcf7f318894cd8667f709bf970fa8c582a8027402ea75fdf14ac0e15260a4d2
font_01_sfnt_off0000d11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11F 16872 bytes
SHA-256: eaf1d9418b220ddd0cafbbbb52233eb739db2befbbc92df47bf9f3d34990cf41

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