Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a464af33bebd5c…

MALICIOUS

PDF

81.2 KB Created: 2021-03-25 18:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d944c36fefac17d49e646c2ea785422c SHA-1: 803d41e2e4d6b04ed6832c467a9bfc90be0d47aa SHA-256: f9a464af33bebd5c045206f9bd58ab2aa125b3e55f293fbed25062389ef1b203
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains embedded URLs, one of which, 'https://gimoguvi.ru/strik?utm_term=mackie+cfx12+mkii+12+channel+mixer', is likely part of a phishing lure. The document's structure and embedded links suggest it is designed to redirect users to malicious content, potentially for credential harvesting or malware delivery.

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://gimoguvi.ru/strik?utm_term=mackie+cfx12+mkii+12+channel+mixer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425909/normal_6034f04dd4852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_6058429ab0b8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_6041f7ff309e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_602f1992ec0ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_60224f6eb3a69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_5ff135f6a2fad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426080/normal_5ff515f8d88bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466172/normal_5fc5c81a35d41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450145/normal_5fed5746a6b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5fea42a9238ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivubero.epizy.com/19766206366.pdfIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_763a377da6d94e44906f4f123da901a9.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_c493216009974898af1091b176c75b3f.pdf?index=trueIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_b6eaea3ef0a34d89b4d29762478acd73.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_d8433b3c90e7459fb5c530008443c3df.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_10432455bf2d47e2a940b2ce36553178.pdf?index=trueIn PDF document text
    • http://remigesej.epizy.com/ladazuxupijelegag.pdfIn PDF document text
    • http://fegarezitima.rf.gd/55273998059.pdfIn PDF document text
    • http://gasolawatovi.rf.gd/lokaxiwilamevezurin.pdfIn PDF document text
    • http://boxemoje.epizy.com/47440439482.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_cac773bc9b924017bfdf91f4c99516e2.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_fcb2b8cb78ee412db019d5da4f91b2cd.pdf?index=trueIn 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_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 5264 bytes
SHA-256: 32016e0dcec8934307d888bbb0c93cbeb7f1c3d4402fd143c21a8041b76047ff
font_01_sfnt_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 16268 bytes
SHA-256: 941ee3d09049c7d9c25d4575b1a2bb3bc4962093fe165059a7d91dbf136339a9

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