Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c57f62f4baa060…

MALICIOUS

PDF

70.9 KB Created: 2021-03-02 01:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55d93a6b241a6edcf42e1ba849fb9c9a SHA-1: 4f342fe8e2c17afe2860e67ec09d45a3eef7d892 SHA-256: f6c57f62f4baa06024f457844170f72b9606a0f3e22c5bfb074aa1ea8091b1b5
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs pointing to suspicious domains, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=shampoo+bowl+and+cabinet+combination PDF link annotation
    • http://naturalm.space/powerpoint_presentation_template_free_professional9mz1t.pdfIn PDF document text
    • http://gta-msk.ru/73874976779q6gwi.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/hggemnJ/tabofuzugavilezubeja.pdfIn PDF document text
    • http://tolizidusinakil.22web.org/beforehand_information_meaning.pdfIn PDF document text
    • http://pshcomonhere.xyz/mcgraw_hill_wonders_grade_4_vocabularyzmlv7.pdfIn PDF document text
    • http://sberin.xyz/mr_dj_repacks_websiteg28q0.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://wufuxoponuwuros.epizy.com/how_to_check_continuity_without_multimeter.pdfIn PDF document text
    • http://vopepogam.rf.gd/boulevard_nights_full_movie.pdfIn PDF document text
    • http://defipezisezujor.rf.gd/952145375.pdfIn PDF document text
    • http://retuguru.epizy.com/r_programming_books_oreilly.pdfIn PDF document text
    • http://jowosos.myartsonline.com/47559286072.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/why_do_babies_get_fussy_during_leaps.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_off0000cc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9B 5160 bytes
SHA-256: a08a2d290d73a6055894e420f644956160447ce0f1957999c5a5da4da39909f5
font_01_sfnt_off0000de04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 10200 bytes
SHA-256: fc7a6909901d3b06ec807ea65f7e6c49d8cec7d1fa5210af8df3e5b8031fab39
font_02_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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