Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c4ea47255421e8…

MALICIOUS

PDF

71.5 KB Created: 2021-01-28 15:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0ae2f7e678853b9d46aca0c796543d2c SHA-1: 0d4c8794dab488d8409768f098b58a334ff23710 SHA-256: 60c4ea47255421e880fc626449d64a77a973ab0798fb1142f5f5185640e53766
126 Risk Score

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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/wb?keyword=color%20fill%203d%20mod%20apk%20android%201 PDF link annotation
    • https://cdn.sqhk.co/mivufarowiwi/cjhSgiK/adventure_communist_mission_tracker.pdfIn PDF document text
    • http://tijoxuxiga.iblogger.org/anaconda_2_movie_in_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_6005bc5eca84f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fffcbd2ada9a.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/vusaxagoso-disugefidokelu-rijet.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/ehh6Aii/95895723460.pdfIn PDF document text
    • http://megesodore.iblogger.org/derefatiwepinukozakogafo.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/cast_of_hitchhiker_s_guide.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/f05d60d2584e.pdfIn PDF document text
    • http://sexedate69.site/oracle_administration_workshopbejwt.pdfIn PDF document text
    • https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/33ad3344dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resaruxowepu.epizy.com/investment_association_guidelines_purchase_of_own_shares.pdfIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/97983937966.pdfIn PDF document text
    • http://bupujipa.epizy.com/basilisk_knight_osrs_slayer_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C8 5192 bytes
SHA-256: 172eb2eab99b02723271fbc179f63b61fa2e7494cd2ff8d3b433344f43d4b365
font_01_sfnt_off0000e363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE363 14400 bytes
SHA-256: b05b2b695c6d15ceb24e9e1b74ba1078ebadebdf1b36ced0020725e1fb0f5643

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