Malicious PDF — malware analysis report

Static analysis result for SHA-256 93241f1f98905d5d…

MALICIOUS

PDF

72.7 KB Created: 2021-01-07 21:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2b24b1cebfb36157605679ced9f3feb SHA-1: d950c03809a8f94a4ac96cc4542446e6426492a5 SHA-256: 93241f1f98905d5d89aa3ab4d76955061df8717d9c6eab311630c996ef18cc30
154 Risk Score

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/aws?utm_term=happiest+baby+on+the+block+dvd+worksheet'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=happiest+baby+on+the+block+dvd+worksheet
    • https://cdn.sqhk.co/dorejewibiz/mDjhhaB/cloud_bubble_shooter_game_download_apk.pdf
    • https://cdn.sqhk.co/sizozizaj/LBBjdWG/ziwuni.pdf
    • https://cdn.sqhk.co/xeposetuge/k3jjZwq/18119510846.pdf
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f9efd857b670.pdf
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5ff54269bc1c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juzewojavomofew/audit_report_format_2019_icai.pdf
    • https://uploads.strikinglycdn.com/files/a204d385-21b0-43c2-bf06-9008414cc0ed/falling_puzzle_apk_uptodown.pdf
    • https://s3.amazonaws.com/jejulurowev/fowudi.pdf
    • https://uploads.strikinglycdn.com/files/3ade36ca-6557-4dab-8bff-36162af48615/very_astute_in_a_sentence.pdf
    • https://s3.amazonaws.com/vonusirukete/22653109774.pdf
    • https://uploads.strikinglycdn.com/files/8eace47a-d415-4268-84be-9a24ad8b9707/fevetiseni.pdf
    • https://s3.amazonaws.com/davawina/58433275523.pdf
    • https://uploads.strikinglycdn.com/files/42044ee7-52f5-4d2f-b658-1bca16c7bdfb/69924614046.pdf
    • https://uploads.strikinglycdn.com/files/344b770b-2473-4b78-9551-aacd4492c799/desekatugilunasurubit.pdf
    • https://uploads.strikinglycdn.com/files/46514c9a-1587-4132-b522-55bf7b3fbb36/58930463789.pdf
    • https://s3.amazonaws.com/vidadaviwal/jaxawo.pdf
    • https://uploads.strikinglycdn.com/files/286a4f6f-9085-4be9-884a-a536f73748db/toroditezafe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd61.bin
c69646a2cf1049d0779df2b96543b3815b4255dc108708b7ab8f6a70a58166b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 5580 bytes
font_01_sfnt_off0000f05b.bin
7012bf58a648ef6a808d749365b12b1c99d4aaf475ad28f7760535a286b856ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 10848 bytes

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