Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f6d73c2c26ea80…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 08:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 891bd3ccf0839cd83cfc6410da0ac6b8 SHA-1: e5363444f892c607a2ecc0960ffb3b28e461af6d SHA-256: 91f6d73c2c26ea8091c40bbe63bc4d6a7830b2c2283de0e52ad80137e76027ba
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://golowaki.ru/wix?keyword=truvista+tv+guide+camden+sc PDF link annotation
    • http://dewisazovuvoxi.mywebcommunity.org/living_in_harmony_with_nature_definition.pdfIn PDF document text
    • http://evilcheats.fun/90976852956c9w10.pdfIn PDF document text
    • http://meblik.su/1209289910p5d4a.pdfIn PDF document text
    • http://msertis.xyz/matthew_hussey_marriage1oks6.pdfIn PDF document text
    • http://tersq.space/english_conversation_for_beginnersa5o4w.pdfIn PDF document text
    • https://wadagubabu.weebly.com/uploads/1/3/4/7/134709622/3761cdced.pdfIn PDF document text
    • http://guvetosufawi.22web.org/hp_pavilion_dv6_3000_service_manual.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
    • https://s3.amazonaws.com/jafujasiwetid/acronis_true_image_home_2010_portable.pdfIn PDF document text
    • http://voferumupisefag.rf.gd/31948426913.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/88701336983.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/do_xbox_turtle_beaches_work_on_pc.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/redajovajageket.pdfIn PDF document text
    • http://zaruxokogidut.epizy.com/fosofabegukegag.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/17567161213.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_off0000cec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC0 5008 bytes
SHA-256: b1dd202b98a271daaa56af4456f60a12e1d7f070c9c7169773a5832a7f201e68
font_01_sfnt_off0000dfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA8 13452 bytes
SHA-256: 56badac5e120ba6eb40a6f01d7dfab66d7019c1fcdfc22afb60ddd42e48e0bb9
font_02_sfnt_off00010ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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