Malicious PDF — malware analysis report

Static analysis result for SHA-256 835814a30a5db9e5…

MALICIOUS

PDF

73.4 KB Created: 2021-04-02 00:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5facfc3edb84c89a039c6c4bea06884d SHA-1: 49bd3fce6527d542eac65b118ffa81f31097ca6d SHA-256: 835814a30a5db9e5967d7df697bdca7b1a7ef68c38d78c06aa820904fa1db09c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'game of life video game download' and authoring information, suggesting a lure to a malicious site.

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://pelibifir.ru/strik?utm_term=game+of+life+video+game+download
    • https://cdn-cms.f-static.net/uploads/4374178/normal_6018844de749b.pdf
    • http://jijoxep.getenjoyment.net/wikasomomezanapufodigivop.pdf
    • http://tomogorman.com/net_technical_lead_interview_questions_and_answers4p12h.pdf
    • http://infonewstravel.com/ventajas_y_desventajas_de_la_red_wanndlcp.pdf
    • http://fidesuwuranotif.getenjoyment.net/class_12_biology_syllabus_2020_20.pdf
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5ffc0296e2142.pdf
    • http://natlab.ru/war_world_tank_2_apk_obbkdzkk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f097dd51-e2f1-457f-8271-995243962997/best_free_online_guitar_lessons_youtube.pdf
    • https://uploads.strikinglycdn.com/files/d6e1cc41-3c96-4506-9278-6c22b32895df/buvemonosiwi.pdf
    • https://uploads.strikinglycdn.com/files/d18dc76b-c22d-49ff-89bb-50f92667445f/notelonadoxanududafum.pdf
    • https://uploads.strikinglycdn.com/files/01f892db-8973-4316-aab9-1ff2bed4b8ea/72245804944.pdf
    • https://s3.amazonaws.com/jikopot/podat.pdf
    • https://s3.amazonaws.com/wudibirewuduto/sijopemirenomu.pdf
    • https://uploads.strikinglycdn.com/files/e12883e4-3d71-459c-9d40-20f431109ceb/najegibosararijed.pdf
    • https://s3.amazonaws.com/likerajatob/the_book_of_life_2_2020_release_date.pdf
    • https://s3.amazonaws.com/jutenojamega/eleanor_rigby_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/0c1b4e07-3056-4c3d-a777-4bca09226c56/46330090983.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_off0000e2ce.bin
31b2940dd1a7bb1d915c7947b5ced883ca811dad9e46c5d24a7b05dc797a9c49
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 5136 bytes
font_01_sfnt_off0000f45a.bin
f31bc013ec16d708a3e7cc02884ce5470df8e486451cb247623dfa1f67963303
pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 10636 bytes