Malicious PDF — malware analysis report

Static analysis result for SHA-256 2543e3708de908e5…

MALICIOUS

PDF

82.6 KB Created: 2020-12-03 23:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 31bc8c793688bf28b8ccc42ef3b60706 SHA-1: 381a4fbb152e31b24f86b34543015557891e317c SHA-256: 2543e3708de908e54dd54248aff030e4c8faf5b205710002f7c18273d4d142ae
154 Risk Score

Malware Insights

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

The file is a PDF containing a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?utm_term=google+ac+1304+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5fa8eaadafcb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_5fb494526cc63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/10f6486b-4ed6-4945-8919-2c10f9ca7862/87857809489.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e03b1c8c7413143ed9a1/t/5fc815a246ef2e08cba71f1c/1606948258438/shark_evolution_game_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc114532bbd74065807882e/t/5fc31f05f81c9a2a0c08a5e4/1606622981866/suxavobeponejerawixib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d88868612547ed7fee2a/t/5fc5fb424e98326c02df2ecb/1606810438758/wow_guild_name_special_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2c42cf-64ef-44c2-9d95-44f0ecf340cb/lutodagolozutiluzubo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe124d4f98375720a80e32/1606292047536/griffiths_intro_to_electrodynamics_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/39246711510.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0dc53c6ccf69f3260b16/1606290896172/74386178059.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/jalogapaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/free_sample_employee_handbook_template_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 5076 bytes
SHA-256: 9a76c8543d3591824b2c1a7f148468b912fdcd00e49ec30e29ebe71f7000f7ef
font_01_sfnt_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 11700 bytes
SHA-256: c4916a013a92464058598b4e33c31a3c9374eda1e5b1d5d03a5c6f5efd597b62
font_02_sfnt_off00012f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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