Malicious PDF — malware analysis report

Static analysis result for SHA-256 e005cb949c49dc4e…

MALICIOUS

PDF

89.9 KB Created: 2021-02-27 19:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2cbae6baa6f1e486751894825c8b9a9c SHA-1: 911d2ab2d0b2af3598846836da1744f13411ad6d SHA-256: e005cb949c49dc4e0e32c8be074eeb5bf8c75d5388d48efc62d5f95563356cd6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=what+is+treasure+island+sf PDF link annotation
    • http://klosheff.xyz/medefapefulumufedulybfe.pdfIn PDF document text
    • http://scrlt.xyz/12417757769e3pko.pdfIn PDF document text
    • http://safodimim.iblogger.org/lizardmen_guide_steam.pdfIn PDF document text
    • http://tryici.xyz/listening_pre_intermediate_worksheetsxsyef.pdfIn PDF document text
    • http://housefashion.ru/hindi_alphabet_matching_worksheetsc27fo.pdfIn PDF document text
    • http://genoray.pro/donemexikine5dma4.pdfIn PDF document text
    • http://ig-copyrightnotice.com/valatollronh.pdfIn PDF document text
    • http://rineset.xyz/cognitive_behavioral_therapy_severe_depressiontcpq6.pdfIn PDF document text
    • http://helpcreditscore.info/rt-ac55uhp_default_passwordigkdp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kazowaz.rf.gd/3525337994.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/bed_sheets_made_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/62487973473.pdfIn PDF document text
    • http://fujesotes.epizy.com/vtech_first_steps_baby_walker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/cdc_guidelines_hep_b_exposure.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_off0001201d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201D 5008 bytes
SHA-256: cf80d5f64b5dde9573af5ed8928496e056b1709597b9a36e35bcb9d6e80ab0fe
font_01_sfnt_off0001312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312A 12236 bytes
SHA-256: ffa5b40fd1d4451ae7075373ccbe7d7d118a37129ad41c04c699ebdb36279691

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