Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f30f461d9ab5ed…

MALICIOUS

PDF

65.0 KB Created: 2020-12-30 16:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7927ab80e6dd212fe16e70d3ddb4bc SHA-1: 73748be75a58d1ef3ebd23a61dd2dc75ab83c531 SHA-256: 26f30f461d9ab5ed67902376043cf03347880d5288067c56602c04fd61756ebe
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, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though obfuscated, contains text related to a 'study guide download', reinforcing the phishing pretext.

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://traffset.ru/123?utm_term=the+bait+of+satan+study+guide+download
    • https://cdn.sqhk.co/xubulozirod/o0Djfka/23981683908.pdf
    • https://cdn.sqhk.co/gujadozede/hjgUSii/walkthrough_fall_guys_game_xbox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexesazaxasa/civ_vi_for_android.pdf
    • https://s3.amazonaws.com/xotomisen/63262082293.pdf
    • https://s3.amazonaws.com/xetasif/sims_medieval_cheats_unlock_all_outfits.pdf
    • https://s3.amazonaws.com/tobito/8th_class_maths_question_answer.pdf
    • https://uploads.strikinglycdn.com/files/bd801ffa-fe0c-431b-b463-e9ab944b895a/bike_simulator_3d_supermoto_ii_walkthrough.pdf
    • https://s3.amazonaws.com/vanatul/jajoka.pdf
    • https://s3.amazonaws.com/sojuravewi/pudunagetozutapa.pdf
    • https://s3.amazonaws.com/topipovikapari/autocad_2014_mac_crack.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/brother_printer_model_hl_1201_drivers.pdf
    • https://s3.amazonaws.com/levovod/alchymista_ke_staen_zdarma.pdf
    • https://s3.amazonaws.com/fifuto/21215857846.pdf
    • https://s3.amazonaws.com/falevi/gzdoom_3d_models_pack.pdf
    • https://uploads.strikinglycdn.com/files/622025d4-58a5-4afa-8870-0943dd7e5802/boston_public_school_calendar_2018.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_off0000c0d2.bin
00839cda2d9d941c9bd84163cf152407703b45a096de47c68b9c7bafd3bdded3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D2 5356 bytes
font_01_sfnt_off0000d320.bin
e32a9cb915db9643fdb04dba351efe4c2a23ec15dbd2ddd944c56ea27beeb9bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 10412 bytes

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