Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d63b15be6201bde…

MALICIOUS

PDF

74.0 KB Created: 2021-02-26 22:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b6c7824a68c0d6ffdab1f50ea00dbac4 SHA-1: e3d136e19860f645de094ee425dddf858b54714b SHA-256: 5d63b15be6201bde64d07b17439ab92b60583212295305f3e609b647123d45ea
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, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

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://druttle.ru/strik?utm_term=advantium+120+microwave+parts PDF link annotation
    • http://snail-case.store/bbq_party_menu_templateva1fx.pdfIn PDF document text
    • http://lovelyhouse.online/maze_lucifer_actressls5up.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/raleridex.pdfIn PDF document text
    • http://uspex22.online/growtopia_indir_bilgisayar_iinl5j40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5fed37235709e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489983/normal_5fff4b1e1a448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_602f76a34e695.pdfIn PDF document text
    • http://tohld.in/damibiviwa5dssb.pdfIn PDF document text
    • http://electriccannoz.club/lodikafigokijedikabigewue56a4.pdfIn PDF document text
    • http://pedron.fun/how_to_draw_monster_truck_wheelsdls6w.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/ajainig/53217003039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nigimul/nomufavi.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/zivonijorebijuze.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 7

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_off0000df5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5D 5656 bytes
SHA-256: f4c33e24995533d6f627edc2a77958d3175b460b4a048b314698e6e13c3dcb43
font_01_sfnt_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 12112 bytes
SHA-256: 8cc8e6291c981f27fc757e5b955abbd520d0f5c952c7a976e8ede04393a96e2a

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