Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b63279b3c39c86…

MALICIOUS

PDF

75.8 KB Created: 2020-12-25 22:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26530cbde8837d16107e4fcaab03e014 SHA-1: 16e27a512c614257bb9bf5d74aa70ba76adc3d74 SHA-256: 66b63279b3c39c86ddffdec49e6f7cb95f729770b2d6ccd51ba5845679e8f629
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the critical heuristic firing suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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://cctraff.ru/123?utm_term=in+broad+daylight+movie+netflix
    • https://cdn.sqhk.co/xotabuti/Hgijuie/kujevod.pdf
    • https://cdn.sqhk.co/rejibebadit/Yhggjsk/techno_music_online_radio_stations.pdf
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f928782f39d7.pdf
    • https://cdn.sqhk.co/lejukujegomi/94iggfl/vowiroxufolut.pdf
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5fcd352e24ecc.pdf
    • https://cdn-cms.f-static.net/uploads/4482406/normal_5faa1fce1783e.pdf
    • https://cdn.sqhk.co/guzunilepin/czVpJjb/microsoft_teams_for_mac_version_history.pdf
    • https://cdn.sqhk.co/rodoruwuwab/DuJifhi/sad_glass_to_happy_glass_game.pdf
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f9444fe85ef8.pdf
    • https://cdn.sqhk.co/leburogutu/fgdghiB/955426990.pdf
    • https://cdn.sqhk.co/wemofisejaf/2ibNgeY/one_gotta_go_meme_food.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pexodugosa/nugavonivogeniwixudawezum.pdf
    • https://uploads.strikinglycdn.com/files/05061c8f-83cd-44b2-87a8-670b10550554/guild_wars_1_leveling_guide.pdf
    • https://s3.amazonaws.com/susopuzupure/applied_linguistics_guy_cook_free_download.pdf
    • https://uploads.strikinglycdn.com/files/c4bfbc71-bdf0-4ed9-947f-d2ef8bccf0c9/19561242365.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dedf.bin
9fa2b04246990204e475be6635e14c3038480f1330f739f5047eb13d900056a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDF 5240 bytes
font_01_sfnt_off0000f081.bin
188de0af0e70fa226d738613ad4439b2868695d424ee18e938c028a9f79370a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 10348 bytes
font_02_sfnt_off000113f6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x113F6 4324 bytes