Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4101a9f7a746bb…

MALICIOUS

PDF

81.0 KB Created: 2021-05-10 10:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 579cbe3b27e6a447710b7d7e9e4f3e1d SHA-1: 08a4dad05d66128a2fc55d4244d9dcfa9d5c66ce SHA-256: ce4101a9f7a746bbd2cb9b68929e8910dd4748a3737aa0f3025fb2d95dc5b0b5
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple embedded URLs, with the primary one being https://nipisod.ru/strik, likely leading to a phishing site. The PDF structure itself is also suspicious due to duplicate object bodies, indicating potential obfuscation or malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://nipisod.ru/strik?utm_term=principio+de+funcionamiento+del+motor+de+corriente+continua PDF link annotation
    • https://cdn.sqhk.co/jozopotuwomo/aRhctZj/funny_joke_stories_to_tell_your_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/tanemurad/hjjDgeV/school_of_dragons_ios_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/idujbig/video_maker_with_apple_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460682/normal_5ff204a957c21.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/gjhdcid/buwerumagolibix.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/ihgha6z/mumowiled.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/IGiggfm/online_food_shopping_uk_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/9Jigl2m/pekewopolosej.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/athlean_x_max_size_workout.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/hbiajjb/flight_simulator_2020_ps4_controller_bindings.pdfIn PDF document text
    • http://zenaxudoriw.mypressonline.com/chaos_knights_codex_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/1pJ6xid/tekadegewubeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_6068a32261495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/lomedun.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/8587656241.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/25989767637.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 5124 bytes
SHA-256: 9f8d545c98d33f14c1dd48ba9550ccf0138c0605be4d1c2707928b4356bcfc85
font_01_sfnt_off00010f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F09 12084 bytes
SHA-256: b481879cbd1f526e81d73d14ffd19207481bc6829438bfa9b5a4f90ea85f35de