Malicious PDF — malware analysis report

Static analysis result for SHA-256 a531654c7814fec0…

MALICIOUS

PDF

76.3 KB Created: 2021-01-13 12:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 088cd3d71d1180dc69c66f47b749c0ea SHA-1: 535c711d758f2bc80688bea07495704739bfe8ac SHA-256: a531654c7814fec0104414567a5d2e29e147c958730bee0cb22c30f422ab04ea
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a suspicious domain, likely serving as a lure or a distribution point for further malicious activity. No scripts were extracted, but the PDF structure and URL are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=graham+hancock+pdf In PDF document text
    • https://cdn.sqhk.co/dajebala/7ibnRij/79992094906.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/3LibChh/vector_calculator_addition.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/ohbgmhh/little_alchemy_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/ggjkghk/soul_knight_secret_code_list.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/dpCvMgh/99210392032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_5fa758123514a.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/wizuluworafid/2018_malayalam_movies_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/34621321348.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/gidumevewip.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/b._a._m._s_full_form_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/xixabomazurobokaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/hackerrank_questions_and_answers_java.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_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 5280 bytes
SHA-256: 005d2549e0abe71f5bf45011c3ee469a59b82f37b99df134d142c45e4bb2496e
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 11876 bytes
SHA-256: 3e100536760b1320337ea54b5dc61132cd6e87b27ab4f94b6715bd06d907b95f

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