Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60364d6eee970f8…

MALICIOUS

PDF

113.9 KB Created: 2021-03-04 17:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ed57a9c7a06680dddd87126725fbbed9 SHA-1: 578599f3abbe26748fe4ee8b0ec9a082ab074612 SHA-256: d60364d6eee970f817debf535816b8b53ccc331d073691f5dfc932372ffd0c94
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate that the document's primary purpose is to redirect users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/award?keyword=resumen+del+libro+la+meta+por+capitulos+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379855/normal_5ff0b184ccef0.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/bih8jjd/hangout_with_yoo_episode_60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5fda93b97ae3e.pdfIn PDF document text
    • http://soldonlittleton.com/movawadjcq8o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380379/normal_5fcf3bfbf2052.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/ljgC3EW/42411131535.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/jchgXft/tanglefree_panel_blind_brackets.pdfIn PDF document text
    • http://andyhongdigital.com/calculus_1_limits_problems_and_solutionsf8wt9.pdfIn PDF document text
    • http://goodshopsales.xyz/zuweduxuzokujujixaxuritujfq5kt.pdfIn PDF document text
    • http://sallehq.xyz/6275999019040ije.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/gDjdhe6/51736491838.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/cKKijhw/stern_pinball_world_poker_tour_manual.pdfIn PDF document text
    • http://osummer.space/navugumanapibagurigezek1w5q.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/Kidji8x/25045857800.pdfIn PDF document text
    • https://cdn.sqhk.co/gexedamej/Ujj6ehd/zemijezekedi.pdfIn PDF document text
    • http://paktum.pro/467065996106st0b.pdfIn PDF document text
    • http://copyright-security-ig.com/35245824686c4q6j.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/c1jahiW/96635292272.pdfIn PDF document text
    • http://hookup681.site/92739607718uqr16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_60289bc0a94ac.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/6tlgfig/fenukuxetoju.pdfIn PDF document text
    • http://chestlune.online/mivalumuruzuwodezagzeqlr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00017d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D02 5448 bytes
SHA-256: ee8a15fd9b8216513ca5073c187775f63bb2a62446cb87a4cfc8ead3a8267bdc
font_01_sfnt_off00018f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F6C 12524 bytes
SHA-256: 0df05f8d07540b7b0c4e3ee6959913e7ee7c4cbd8a7e42766e92134a3e3d6b6b

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