Malicious PDF — malware analysis report

Static analysis result for SHA-256 05be7b10cc0847a0…

MALICIOUS

PDF

76.4 KB Created: 2021-03-10 10:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d9bca04826f69174c1c582ace10807df SHA-1: fba72a10a51776d1a3f6b29b482587ac0b3ddece SHA-256: 05be7b10cc0847a0964c1560402cde33056319860189c86319ec416d3b30c0c0
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 pointing to a link farm hosted on disposable domains, a common tactic for SEO manipulation or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests a lure document designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=where+can+i+throw+away+my+washer+and+dryer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426572/normal_603ac3549abc7.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/teoria_de_enlaces_quimicos.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/80793510620.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/identical_ellen_hopkins_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/qELgjDM/4266094961.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/jfieNbl/amazon_prime_video_apple_tv_not_loading.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/p1gehev/color_switch_brush_cleaner_review.pdfIn PDF document text
    • http://cetop.xyz/how_to_use_ac_remote_control_sansuig3b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_5fd9881c33a40.pdfIn PDF document text
    • http://gratoramaa.website/33133044815k313i.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/definicion_de_arte_segun_autores.pdfIn PDF document text
    • http://picply.ru/kasimozepefudobanawamugi7myqv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466666/normal_5fdedd7dca8d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498986/normal_5fe6785615aa3.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/iuQhzje/stickman_shooter_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5ff37cdb856c4.pdfIn PDF document text
    • http://fajamad.mypressonline.com/imperial_leather_mcclintock.pdfIn PDF document text
    • https://cdn.sqhk.co/koluvukirate/V8tifia/97624886401.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/saul_alinsky_rules_for_radicals_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/full_marks_practical_skills_in_science_class_9_download.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 5

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_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 5352 bytes
SHA-256: a9b432f9c8b586e4aedd4899ac70feb678de7e3dc9fb258f9e1aa7156408f1c1
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 10352 bytes
SHA-256: f8b263e582e55168e6153625144602e6caf0eb9b9fe6550b1a360a382afdc6d9

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