Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07263669af4387d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-26 19:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8cb90c3ba15acc2180cc58e447813268 SHA-1: c3cf558337bffa4ede1c4e5f456515aba0af261b SHA-256: e07263669af4387dbe47c2ee9651af88b96221f2c15da054987238522e5f9124
126 Risk Score

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, including one pointing to 'maypoin.ru' which is associated with a keyword search, and another to 'rrrrkkkkk.space' identified as a link farm. The presence of these URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=windows+media+player+visualizations+spotify PDF link annotation
    • http://rrrrkkkkk.space/gamer_girl_chat_up_linesgdebm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_5ffcd6045ef74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_6032876052025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_600f2dfd15ab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5fd116c07009c.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/difference_between_1_phase_and_3_phase_induction_motor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448538/normal_5ff88b12b8015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_6052d5ad6c0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_604e15e972543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5fcf52e195308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fdc50422a9b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5ff39003e099f.pdfIn PDF document text
    • http://devlp.club/vuzixivefokol6hh0g.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/ancillary_services_in_tourism.pdfIn PDF document text
    • http://instofficial.online/whats_your_angle_pythagoras_bookj7wic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5fda26df33138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_60186e9c8efd8.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/english_test_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60142d2d07e5a.pdfIn PDF document text
    • http://kukushpa.fun/41097879427uoq66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365639/normal_60021dac8a5e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pexofapu.myartsonline.com/buxibodedadirirefajunava.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/pijaxubezuxududubagema.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/data_analysis_in_spss_with_examples.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/star_trek_into_darkness_cast_carol_marcus.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_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 5504 bytes
SHA-256: 6bf475fa34bdc6d360d1e6fce3480f7f52410f06c65b5d86cb9d89e2f3a0a9e2
font_01_sfnt_off00010408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 10912 bytes
SHA-256: 7726dc14464349facd2d038f1fc02250a4bdc81f8c4ba3feeb7cf1d38427d0c2

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