Malicious PDF — malware analysis report

Static analysis result for SHA-256 37134373aa0c43ee…

MALICIOUS

PDF

70.9 KB Created: 2021-01-15 05:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ea68ec01cec36af4a0011eaf60a20a SHA-1: f50603db6cefd624d69f4d6186e71c8958f006ca SHA-256: 37134373aa0c43eea004c14ff8e81cb700436f17e16d9c61da0f3d50750e7cdf
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/wb?keyword=bandpass%20filter%20calculator%20lc'. This indicates the document is designed to lure users to a potentially malicious site. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=bandpass%20filter%20calculator%20lc
    • https://cdn.sqhk.co/gemadaruvow/S6QzmRT/photo_lock_screen_premium_apk.pdf
    • https://rarasaxemog.weebly.com/uploads/1/3/4/6/134611000/zobavemisikivuk-luwuguvop-fojita-nurulexipol.pdf
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/kegon.pdf
    • https://sovevalejuwup.weebly.com/uploads/1/3/1/8/131858043/wilogawefabipuxajek.pdf
    • https://vebazefi.weebly.com/uploads/1/3/4/0/134040586/1491769.pdf
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/hhidqhc/country_music_videos_online_free_to_watch.pdf
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/panofufakipaluk-minikawugixogov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/meludav/formal_charge_on_boron_in_bf3.pdf
    • https://s3.amazonaws.com/jamokaroxoj/lisupedafodok.pdf
    • https://s3.amazonaws.com/gofilafixu/adelle_basic_font_free.pdf
    • https://s3.amazonaws.com/tawosutosuxi/comprehensive_biomaterials.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_off0000d7e5.bin
9a7df09c87167ad2139b691922294d5b4f2f5d9c64f663d912d2f76143116be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 5200 bytes
font_01_sfnt_off0000e9a1.bin
c9b76f57c6c37d7dd5d4ae8c5c1c6f3ee1902e2ff9eb3ae062e76c304da2c5f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 11028 bytes

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