Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ee37e9f1053185…

MALICIOUS

PDF

83.0 KB Created: 2021-04-02 05:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a47af40c91fb499c34d565e5730bfc5 SHA-1: 7b5f96d5be4cec5e2b206d3855f52446ca0def54 SHA-256: 88ee37e9f105318526e48bedeb62a557ecd6220fb0c0da8d09f2f4e74a546d57
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a phishing lure related to a game. ClamAV and ML classifiers strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a theme of game guides, which is a common pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=how+to+beat+riddle+school+3
    • http://govetet.22web.org/how_often_do_you_water_flosser.pdf
    • http://xegazufagabapo.22web.org/35601180522.pdf
    • http://sibarorum.iblogger.org/xetararonofuzozin.pdf
    • http://pycnidwzxc.info/mackie_1402_vlz_pro_manuallxm38.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://bcpzonasegur4viabcp.com/tazukimefimowudonijibct1p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c34b3c92-aa71-4a9c-b02e-6e6138c3db21/75425448266.pdf
    • https://uploads.strikinglycdn.com/files/e69534c9-4940-49c2-aa03-6e8cd0d93399/donetezoxiwiwizeluru.pdf
    • http://ridupokibi.epizy.com/zatozivajozugiti.pdf
    • https://s3.amazonaws.com/posufij/ridgid_wet_dry_vac_parts.pdf
    • http://sokevigaku.rf.gd/modern_family_a_game_of_chicken_online.pdf
    • https://uploads.strikinglycdn.com/files/22ff8741-1eb2-4d22-b599-f5c255910a04/craftsman_315_remote_battery_replacement.pdf
    • https://s3.amazonaws.com/palikuvexake/58014778528.pdf
    • https://uploads.strikinglycdn.com/files/a2c861e0-ae60-4ca1-b8d9-8dd66d9b2e95/gugudadazukovomejapa.pdf
    • https://uploads.strikinglycdn.com/files/7695073b-b954-495d-927e-ec1e925c9ad2/how_to_make_arbonne_meal_replacement_shake.pdf
    • https://uploads.strikinglycdn.com/files/9cb6d063-2073-47dd-bea6-f726294a43ee/83302833853.pdf
    • https://uploads.strikinglycdn.com/files/3dffd0d4-651f-4a62-b8c7-2da703956ad7/does_gamestop_fix_ps3_consoles.pdf
    • http://luredavum.epizy.com/navevenirovirudomivid.pdf
    • http://munuxodubawuki.epizy.com/reading_and_writing_grade_1.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_off000106ce.bin
61f43efcc903bd48ce7776602a21f759227c4501c9490d589a72a5ade6c61d04
pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 5384 bytes
font_01_sfnt_off00011922.bin
4dfc8067c2f1e82cf7abbdb06a03dc198717216cb400f18e60d557f9abc127af
pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 11112 bytes