Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a288b1d33582921…

MALICIOUS

PDF

136.5 KB Created: 2020-11-18 14:34:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2438a180251ca6b824a240f597757be2 SHA-1: 1d830d77bc2a335321d7aa56d511e5b4a548e4b8 SHA-256: 7a288b1d33582921402054d766ee0adee172951551af97259b801ec02c88567b
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 'ggtraff.ru'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the presence of a malicious URL indicates a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ggtraff.ru/123?utm_term=violin+string+names+notes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fb4ef9d2522d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1652ffb2-c3e6-4076-9acf-a04fb22134e1/fizugenoden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05721c5-4cd5-417f-aad5-13297b12b99e/jitewogegulovatugajapano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620b6768-dfe4-4a21-8cd2-03d76b22d438/95474209889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec1b3c9-bed9-4ea3-a8e2-1d575484be2d/industrial_sewing_machine_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51fd2ca-97d8-4537-86d5-d122f728edfd/99779763347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84098f8d-e06c-4b1a-a376-563732bced79/lalolome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1c589f-7d56-4182-8f85-fa8223a78f53/anime_hayate_no_gotoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886630ef-63be-466a-9f18-45e14e853271/tu_jab_jab_mujhko_pukare_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b2c477c-3b5c-4ec7-b48c-b236df580738/56460668193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2a76a5-49d2-48aa-9a85-2a30a7fc54fe/dezod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c5ff86-bbb1-4b58-ba90-6663b79d5436/13872315906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc852362-ed9e-49ac-8e4b-986cb31442cc/oedipe_schlac_schlac_questionnaire_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1effe07-6337-4a0e-9e09-f7c381eddd53/apa_study_guide_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C038 4972 bytes
SHA-256: f800182cfb7d3634d8c35cd9675166805ecef2ba69af520a2ed99be5f1a6a039
font_01_sfnt_off0001d10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D10C 14376 bytes
SHA-256: 9df07abe7eb215f1e0edf92e10950c6dfb7f95e2c042d3745016c71247300f57
font_02_sfnt_off0001fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD14 16556 bytes
SHA-256: 3c831f9bcfd4727d0ff5f47863779981f2f8914962a26536579ffbe923f8bf73

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