Malicious PDF — malware analysis report

Static analysis result for SHA-256 64563b186b668084…

MALICIOUS

PDF

64.4 KB Created: 2021-02-23 18:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b41ca83a241c9e016b00a324fce1627 SHA-1: dbb00187dfc7d9d3562eed42d2aa873c00175022 SHA-256: 64563b186b668084f154f98c9873df28a32ad93cdf3f45d2fc1e22306d0a6106
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site for further exploitation.

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://seumenha.ru/strik?utm_term=dr+malachi+z+york+book+of+revelation+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379359/normal_600894e71c00d.pdfIn PDF document text
    • https://cdn.sqhk.co/demapibo/he35Rhi/the_light_between_oceans_book_club_questions.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/eat_it_all_lemmyqav7w.pdfIn PDF document text
    • http://xerepanidobop.iblogger.org/autocad_convert_3d_drawing_to_2d.pdfIn PDF document text
    • http://santaparker.store/dukeloxtuilj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_601864036b0ae.pdfIn PDF document text
    • http://izzzaaa.space/acara_scienceb9bus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fdea5e9b7b34.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/u4jagiW/jebagakofafun.pdfIn PDF document text
    • http://kinoxca.xyz/34191582708o29v.pdfIn PDF document text
    • http://avtoshkola-region26.ru/dubalatop2mlk.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/bidemewufa/xewizir.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/kakanurix.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/40921160479.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_off0000bdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD8 5632 bytes
SHA-256: b05a88d1a498e03b9807e332333af2ae1a41c3eb6c079902f16090ca1e42221d
font_01_sfnt_off0000d0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 10488 bytes
SHA-256: 215bd2eccd793faa923c12f9e032c73cb141929fd8b3b74796a8234992cab843

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