Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3501ce150ebe97…

MALICIOUS

PDF

75.7 KB Created: 2021-02-07 02:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6fc7de6859c7307816c835db91684be5 SHA-1: 74548530509e79885a19051abd9679ca10f9b1e8 SHA-256: bd3501ce150ebe97e2b66293ebaa55e1b097f432be9342c246ff1add01ae14f6
126 Risk Score

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 by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to "Khalil Gibran El Profeta Resumen", directing users to external sites. The presence of multiple external URIs and the link farm heuristic strongly suggest this PDF is designed to redirect users to malicious content.

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/123?utm_term=khalil+gibran+el+profeta+resumen PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5ff84b0f3ac91.pdfIn PDF document text
    • http://neo-tp.ru/515173092839wubl.pdfIn PDF document text
    • http://maxist.ru/350z_service_manual_freenalis.pdfIn PDF document text
    • http://itwomen.space/data_abstraction_problem_solving_with_c_7th_editionjrb2d.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/aditivos_alimenticios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5ff79b976955a.pdfIn PDF document text
    • http://winnerslm.space/belize_gay_travel_guidexftqh.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/16560577813uuuua.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5fe3bb614e44f.pdfIn PDF document text
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/jererumibaxe.pdfIn PDF document text
    • http://plsale.pro/bedsheet_manufacturer_in_erode2m6mw.pdfIn PDF document text
    • http://tarenutufitox.66ghz.com/5680278627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rarobijeriv.rf.gd/british_accent_podcast_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/future_progressive_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/blank_gradebook_template_excel.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/wapapivifomakupego.pdfIn PDF document text
    • http://giwofigu.epizy.com/8989194941.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 5304 bytes
SHA-256: 246228fafce0cc5430713d4c8645b0e6c6cc40be44fa6939a12d461a1c6cb7da
font_01_sfnt_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 10628 bytes
SHA-256: f0c8e77a28c7f4b26113baf6c93e809bc9fec0bc9600bd11ac7efc84489ac08e
font_02_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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