Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cf8ee4b1e811cb…

MALICIOUS

PDF

80.0 KB Created: 2021-02-25 15:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bac91f7a8fe45d4d95c343d82336159f SHA-1: 7b7437ceffaa9e560e8a7afa0ba6b8898ded5852 SHA-256: 47cf8ee4b1e811cbc584e1fc3685b4eff237f4f366133701662f5c27f70c0319
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily corrupted, appears to be a lure related to making a hydraulic tube bender, which is likely a pretext to disguise the malicious intent of the embedded links.

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://bologen.ru/strik?utm_term=how+to+make+a+hydraulic+tube+bender PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5fdd5e7b7f25a.pdfIn PDF document text
    • http://fullpisetc.ru/what_does_a_dreamcatcher_tattoo_meanoiuwb.pdfIn PDF document text
    • http://garantiya62.ru/62856096313cs6m4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd3a41fcb93f.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/velit.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/febavuk-namuf-lewemoxuwo.pdfIn PDF document text
    • http://usecabinets.xyz/visemoupdmp.pdfIn PDF document text
    • http://mihetos.xyz/how_many_stocks_are_listed_on_the_nyse_and_nasdaqxgivx.pdfIn PDF document text
    • https://ganaletikuwefe.weebly.com/uploads/1/3/4/3/134306697/0a8405c0386304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_60379bf9e61da.pdfIn PDF document text
    • http://eeeeeyyy.space/uniform_partnership_act_definition_economics6k90a.pdfIn PDF document text
    • http://kudretbozaci.com/kogilefotowufivusanilu661vi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473375/normal_5fc68f6eeb13f.pdfIn PDF document text
    • https://putigored.weebly.com/uploads/1/3/0/7/130738503/folemiruwi.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/gexarosivusog.pdfIn PDF document text
    • http://ru-order-687646765445.art/bleach_3d_games_for_pc_freefqzk9.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://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_off0000f0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 5244 bytes
SHA-256: 5efc864685ab766dadedf7bfd4f137410f3d2a15cfd6edb294727f2b0ba79176
font_01_sfnt_off0001026d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026D 9964 bytes
SHA-256: 73c842cee02d5df49bb351686d6d936aaea9ea25113c75c5887558de334f7c47
font_02_sfnt_off00012483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12483 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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