Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e2e54b881bdbfb…

MALICIOUS

PDF

71.6 KB Created: 2021-03-19 05:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2ffe5057a7e18a73dd2f5990fa296809 SHA-1: 211c6a1370440b69d057c68deeb02774564568c4 SHA-256: 02e2e54b881bdbfb95fbd545bedb3dd579a19d0c45038a78d5de1fba19ffb04c
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The document body, though obfuscated, appears to be a lure related to search queries, directing users to the malicious URL 'https://baarspo.ru/strik'. No scripts were extracted, but the overall structure and URL distribution suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=how+many+calories+are+in+a+dunkin+donuts+caramel+iced+coffee+with+almond+milk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fe87463e88dd.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/2014_charger_srt8_performance.pdfIn PDF document text
    • http://linza.media/kijojexalofefukataax8.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/can_you_teach_yourself_wing_chun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_600ddebeaec0c.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/mapajedepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_603ab2f201439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_604d79e4cdf45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5ff7cf730110c.pdfIn PDF document text
    • http://vutuduzuzawejuj.iblogger.org/7_chakras_of_human_body.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/pdf_auditing_standards.pdfIn PDF document text
    • http://inglassrus.ru/tejazmayjv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/27820165202.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/72804849430.pdfIn PDF document text
    • http://sufutogikid.rf.gd/advanced_concrete_materials.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/duplo_5000_booklet_maker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/cub_cadet_lt1045_drive_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/football_field_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/adverb_clause_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/amazon_fruit_soft_serve_ice_cream_maker.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_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 5480 bytes
SHA-256: 8c9c091ddb9e38ffc3adb0f24d28f3e80b71e65a87be556a14248e9d34ffe50d
font_01_sfnt_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 10708 bytes
SHA-256: 6363a1e04ca8d4d7e899e8c0da9cc1e3a857007602e8810c25d3d827ae3d0b5f

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