Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ab726c844e16ab…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 10:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cc087b962c37c20b593d1d4be11727fc SHA-1: d3831234e0493aad3cb5b42f8899f18e26ef6186 SHA-256: 94ab726c844e16abe733c54aae676dcf6895824eb700914cdefb80a5b7a41f68
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates tracking or phishing lures. Although no scripts were explicitly extracted, the PDF structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=taoist+tai+chi+108+moves+dvd PDF link annotation
    • http://sipipewawezizuf.getenjoyment.net/pabuxaguwozuzejeturis.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/marketing_information_system.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/p90x_weight_loss_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_60253b9cc590b.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/phcgcxl/23964914157.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/gfsegfW/15554108729.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/kisitawuru.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/b06fa3069f59.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/mipafatasawos.pdfIn PDF document text
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/71554.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/vosipitowudalepugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474206/normal_60358252b26d9.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/presion_hidrostatica_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_604a91981cefd.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/sutokaxobatuvili.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://gizixaxeviduf.myartsonline.com/setutotorano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f83d89-3850-4ea5-a652-9cb53ca6eca1/dialectical_behavioral_therapy_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de869e71-e84c-416d-8769-44895e5fc47d/16133453288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cade72-0ab8-4256-bdec-b29aad2206b3/1576527224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934efb63-cc17-402e-9363-13b67731483f/6504226042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e1a569-9d06-44da-b9e9-450cee38ac6a/12305124541.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5128 bytes
SHA-256: 391a0d389bcf945e1f70cc45d9d5f5770036fc34e83f4d588d75806360ddccf0
font_01_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 10480 bytes
SHA-256: 78b9b208fb23c2e8eab42845859a629e9b372953f484e4ccd9a9078185370045
font_02_sfnt_off0001212f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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