Malicious PDF — malware analysis report

Static analysis result for SHA-256 30da91e306d46f53…

MALICIOUS

PDF

75.5 KB Created: 2020-12-30 15:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 068538504e1ffa46977967932740dc66 SHA-1: 06230d1533ffaaa9a16a3702247a5b3c8d02ac1d SHA-256: 30da91e306d46f5363d2a3f638cb36a004bdc93ae2d64a6472b4545e0a9be233
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/123?utm_term=heroes+of+the+storm+leaver+penalty'. This, combined with the ML classifier and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, contains strings related to 'Heroes of the storm leaver penalty' and application metadata, suggesting a lure to entice users to click the malicious link.

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/123?utm_term=heroes+of+the+storm+leaver+penalty In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5faedfde85f3a.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/erogfjf/ball_rush_game.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/jhAjhjb/free_cross_stitch_pattern_making_software_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_5fbf37a31171b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f9858ee9d9f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f9431f309ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5fd67354136ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_5fdc79f0eb66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5fa703857cfd9.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/diwitapezu/exothermic_and_endothermic_worksheet_ks3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03fb16d-818c-4739-b061-0e7f8c95db02/linear_equations_word_problems_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b34930-336c-4abe-a6fc-a02e59849d83/bopilivowenobibatotan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b27ff8-aec4-4eff-bf74-54c31b910e17/jacksmith_cool_math_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/nagavuwofapan/kadapelirusasokewetifok.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_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 5264 bytes
SHA-256: b67e8220f360135203c2122bf0ad76acffe50d9edaa22a808203e45960b16d8c
font_01_sfnt_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 11428 bytes
SHA-256: f25dda4284e0351e6587c92aaa044d79cafcd8d164faafdfd5dfd2d468227ad0

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