Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e335ea63165d336…

MALICIOUS

PDF

73.4 KB Created: 2020-11-30 14:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97bb79ce62cfe08de75836a1baa3d259 SHA-1: 1cbd53c060bba96d36889404cc02d1b82c670e44 SHA-256: 2e335ea63165d3361c6066c70c1ccbab946b0b45d9d48920ce0af8a48683b9d8
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, contains text related to games, aligning with the lure used in the embedded URI.

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://trafffi.ru/strik?utm_term=2+player+platformer+games+unblocked
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f8b6eeb71ad4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc06d09e5c7695ca9994347/t/5fc11eb23c02f22b9d353297/1606491827221/ritufebebo.pdf
    • https://uploads.strikinglycdn.com/files/d3f50570-db67-4f7b-b2a3-0ddd64e5905a/the_game_of_nasty_things_questions.pdf
    • https://uploads.strikinglycdn.com/files/fc3c8654-4a01-4bb5-a511-7c667e96036b/chasing_waterfalls_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/3c64d9f0-42b6-4186-8549-c02edeb51f70/archivo_civil19.arx_de_civilcad_no_p.pdf
    • https://static1.squarespace.com/static/5fc37324df132613bbcddee0/t/5fc4668fa97599144e857193/1606706834585/great_barrier_reef_invasive_species.pdf
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc1aa69145a8629dcef6cac/1606527594028/nomugedesesenuzatib.pdf
    • https://uploads.strikinglycdn.com/files/dd167979-5919-416b-9598-3c733885b94f/zabimemufiparopajugaruna.pdf
    • https://uploads.strikinglycdn.com/files/61899cd3-d8d5-4eee-ae73-4bbf99792857/60035244143.pdf
    • https://uploads.strikinglycdn.com/files/3148ce70-9427-45a9-83bb-f8f3e9bc9d2f/juselinelulanevunax.pdf
    • https://uploads.strikinglycdn.com/files/e4eb821f-ea21-45d4-825e-4de3c2f942ce/birorizanamemi.pdf
    • https://uploads.strikinglycdn.com/files/1e533a58-cdb4-45bf-8e3a-a00a9cea0747/jezunilumubu.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48dc08845d09248059f5/1606371548523/maytag_quiet_series_100_dishwasher_parts.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_off0000e1bc.bin
4ee29062f6eeb2df3f41c23426f787d326e13230f21b3c93aec9fc29dbd00014
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 5816 bytes
font_01_sfnt_off0000f582.bin
8cf831aa184640c2488053a3cadcac7c5e81d846abf7647bba28cd9c00bbc7ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 10360 bytes