Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b85bd5a5d64b1c7…

MALICIOUS

PDF

76.3 KB Created: 2020-12-26 00:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1c67b16c2ff5c69a73d9c59f77da98c1 SHA-1: edee955350af953726924946da821a4482a05242 SHA-256: 0b85bd5a5d64b1c7d6516506b6f16c8ff9ea9a77b3da56a6f89a16e33fce2eab
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL and the document's deceptive content point towards a phishing attack, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=english+premier+league+jerseys+2020 In PDF document text
    • https://cdn.sqhk.co/tewisifupib/gj6TpiA/pisoxedokikafizono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5fd0d5731d3d0.pdfIn PDF document text
    • https://cdn.sqhk.co/nerutamar/cahyjeJ/82874043227.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/gefOjeO/kujowibidesuduvu.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/GDAyhi9/giwamile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_5f97565e72dd2.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/mjjLXi3/gifixakole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f90438c6243f.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/haPPggI/bolarek.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/libeganot/edward_snowden-_permanent_record-_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/above_the_barre_in_berea_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/fegaribejiro.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/matt_webb_ups.pdfIn PDF document text
    • http://www.fanatics.com/english-premier-league/c-31402555+z-856In 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_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 5644 bytes
SHA-256: 112ede921f41d2569e1a865a5be80a12ac607d7beafd3e52573e3cb42a783ecb
font_01_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 10644 bytes
SHA-256: fd3369f8a0f8b3df00f499e2071891818d8b63e21de18f43e5f263918316012b

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