Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd629f247f8f908…

MALICIOUS

PDF

74.1 KB Created: 2021-03-12 18:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8902a5b6c3674b8c319ddd68f23726ff SHA-1: bd4ddc5b91a1869fb6f3f2461c8d2d8af55c602f SHA-256: 5fd629f247f8f9084fd5bc2d10563155aabbbd93d5c6f5d3f246ed03b202965f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malicious content or phishing. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

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://dugedepap.ru/award?keyword=ansi+code+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5fee129fe909c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_6009a48a73a0a.pdfIn PDF document text
    • http://jezopapurowejen.22web.org/buzazor.pdfIn PDF document text
    • http://stonersfranchise.com/what_does_woe_mean_in_slang2mihm.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/igihigj/vivi_bubble_tea_west_village_hours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453532/normal_5ff370b077f65.pdfIn PDF document text
    • http://selectgetc.top/kerifozonaladokcezma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5fd249b1bff9c.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/ZBhdjif/exceed_by_money_network.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/fTFRgfy/80845920606.pdfIn PDF document text
    • http://esmoney.site/543588265127qzse.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/iHjijhn/4runner_roof_rack_5th_gen.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ogdia7N/beguguvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_6008e71721d8f.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/agjrJhd/carrot_fantasy_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450048/normal_5fddbd19c07e3.pdfIn PDF document text
    • https://cdn.sqhk.co/tirazirevemu/7iajfjd/96066552732.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/tIYjgtP/raxitewotojusisozonitod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lubesugoninop.epizy.com/41415727122.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_off0000e7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 4800 bytes
SHA-256: cf343bdcb3a12e333218a35f4986ad61aa5514d05c9ece6eff9df9671a048f50
font_01_sfnt_off0000f81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 10428 bytes
SHA-256: 1432498afe16657f95eebdcd5afa75c550b778a3770ac176eef7394dc06e37da

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