Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba1f908eb35cf49…

MALICIOUS

PDF

80.6 KB Created: 2021-03-10 19:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 19b0a9de8612bc79c6c649cc4a4b0dcb SHA-1: 93437c7f2c718b97526d23d8fe69a96074f88acb SHA-256: 8ba1f908eb35cf49e439e0d2f551d54b4e24b81cfa2627be900111bcc89d4ca9
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'verbal analogy exercises'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/award?keyword=verbal+analogy+exercises+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391340/normal_600d41ef7a2c5.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/sunbeam_heated_throw_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/idggicg/puppy_iphone_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/GnVhhhS/word_search_games_for_seniors.pdfIn PDF document text
    • https://cdn.sqhk.co/dafagupovo/bNf6NXN/negefex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_6017184f8be2c.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/g2VtHgg/dinosaur_hunter_survival_game_free_dino_shooting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nizaveni/hfjfhjb/demerozolukek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6019cbe55a15f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_6005e2ec80c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409814/normal_5feb78a78970e.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/hghbCHX/digital_media_marketing_degree_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_6021ea8caa29e.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/3083507288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_600de92fe0b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501774/normal_6032ce47355b5.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/022537ec-a999-4c94-9bdf-7f448ab80973/tineximapodutaxotogode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceaf3b9d-508a-443f-b961-5f418cf4c440/fugajajavelomovobabozew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b645a853-5fa2-439a-a401-1c5295337d04/48757385657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9bbab2-5252-4708-b58b-876d445d9c63/alesis_micron_patch_list.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_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 5304 bytes
SHA-256: 4596f441c7ec4b0699ce6d7a74f2602aeff3dd7d065f41ec4e48817200ae6ff7
font_01_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 10336 bytes
SHA-256: 7b7afee86abd66da3545cc0faab2c52250e345101083997aea5909a10202705f
font_02_sfnt_off00012710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12710 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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