Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d541055c798ba3b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-17 10:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 63b7cde14332b6b6902372d4d671fc85 SHA-1: d33ba560bffaf08bf224831b6f5890a4cfb1bfc2 SHA-256: 2d541055c798ba3b6aeacab235fa48636a38706eaba30ebf3007478a6344e7ab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign.

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://seumenha.ru/strik?utm_term=are+there+any+recalls+on+2017+chevy+traverse PDF link annotation
    • http://figupatofewox.iblogger.org/vita_henkaku_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gavonenegave/c37a1ii/small_baby_boy_skins_for_minecraft_pe.pdfIn PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/xifopubasonegenig.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/iOcggih/asia_borders_reopening.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_60414f346ee65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_600a2a5873843.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/BDI6hgl/nebelijesopovixuvofawexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_604fc424ca43e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff4663fdc40b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376372/normal_5fe1ea82e178a.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/88067400925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_60480730ef207.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/capablanca_s_hundred_best_games_of_chess.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/nonamanojedanipeso.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/hhjjhdJ/gold_fm_radio_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukadafimi.rf.gd/walther_pk380_laser_review.pdfIn PDF document text
    • http://lowebabufi.rf.gd/jefad.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/97878208794.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/71509677780.pdfIn PDF document text
    • http://janofegiwene.epizy.com/84664233909.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_off0000f58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 5444 bytes
SHA-256: 78b12a0de1c4a899c2c1e9ef69d96056dc44641411c1c2ee223fbde5670312d9
font_01_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 11664 bytes
SHA-256: 81ee3db47c03df560b5cbdadc817d4f1a13316f973cde324ef8c837f054a683b

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