Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ad2d4542191abb…

MALICIOUS

PDF

72.1 KB Created: 2021-03-25 02:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b1b7fec35f5877a01fd0b3537b1b78ef SHA-1: 5bafe86961ab38c4614c2c88b78765af9a1f1c88 SHA-256: 07ad2d4542191abb8c1df71ace7f5fd70c5a926f5c2eec1089758f5cb75c83ac
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The PDF structure and embedded URIs suggest it is designed to redirect users to malicious websites, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=2000+suzuki+intruder+vs800+battery PDF link annotation
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/paratezaso.pdfIn PDF document text
    • https://pedamajemekiju.weebly.com/uploads/1/3/1/3/131380885/xofanemunusejedag.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/R28T3id/singing_lessons_near_me_for_adults.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/1539803.pdfIn PDF document text
    • https://foretenam.weebly.com/uploads/1/3/4/7/134700633/58a2fb4084.pdfIn PDF document text
    • http://jenupekob.iblogger.org/37147309865.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/cch_ct.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/gh8T3Mh/46373564604.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/32080450903.pdfIn PDF document text
    • http://gemajesubon.22web.org/olympus_endoscopy_service_manual.pdfIn PDF document text
    • https://natuvowefuzun.weebly.com/uploads/1/3/4/5/134516005/9cf06bf.pdfIn PDF document text
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/9cb73be77ce.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://sagoralezerelo.onlinewebshop.net/e_book_reader.pdfIn PDF document text
    • http://foxozokibi.rf.gd/nekukezegifowisatubo.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_adab932857e8490ca53b83c3b6699a6f.pdf?index=trueIn PDF document text
    • http://fidegaf.atwebpages.com/physiology_of_synaptic_transmission.pdfIn PDF document text
    • https://78de399b-5cb1-4d05-8290-e7933402b20f.filesusr.com/ugd/10f998_38167e80e80c4ea38398cd789370de68.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 5348 bytes
SHA-256: 1edd808790a45e4d1da91526c728fbae70e1f92212d2068e62d6ced44b907468
font_01_sfnt_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 11144 bytes
SHA-256: 0fb9b73917d4a3aee9ae7c5411d9ea5e2770609080be4f11a127dca705ae3056
font_02_sfnt_off00010550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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