Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01cec4c39eabee0…

MALICIOUS

PDF

78.7 KB Created: 2021-03-14 18:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b4392ad5d00e92d244e3f8aa51c94b0 SHA-1: b760185e36a158d3934b42db75f59d5f1413f045 SHA-256: f01cec4c39eabee08bd6db293e43df2398bc91956c7b3e6f298bd04e889aa6b2
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URI points to a suspicious domain, likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to academic information, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/123?utm_term=tecnologias+de+la+informacion+plan+de+estudios
    • http://lnstagramcopyrigtservice.com/90544928877u6zra.pdf
    • https://cdn-cms.f-static.net/uploads/4502188/normal_603dfaacecccf.pdf
    • http://mexicotop3.xyz/93845494214kohad.pdf
    • https://cdn-cms.f-static.net/uploads/4413983/normal_603b71114ce4c.pdf
    • https://cdn.sqhk.co/wavafinudow/bcjXhcz/81042130482.pdf
    • https://cdn.sqhk.co/budajawisore/vhdAdtv/doodle_halloween_2017.pdf
    • https://cdn.sqhk.co/navimoxa/bjb37ge/cycle_route_tracker.pdf
    • https://cdn.sqhk.co/wogefosa/fIMX3Md/line_connecting_points_of_equal_atmospheric_pressure.pdf
    • http://app-3null.com/death_anniversary_invitation_templatexf2s4.pdf
    • http://health2health.online/clothing_donation_boxes_near_meil1x2.pdf
    • https://cdn-cms.f-static.net/uploads/4480750/normal_6021155a97d76.pdf
    • https://cdn.sqhk.co/rujiwujik/gj8iePD/crazy_car_racing_videos.pdf
    • https://cdn-cms.f-static.net/uploads/4484636/normal_6014e755da9d1.pdf
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5ff9456638bdd.pdf
    • https://cdn-cms.f-static.net/uploads/4481662/normal_5fd29bebb8bdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/buponuwebi/82113814628.pdf
    • https://s3.amazonaws.com/fatisake/flexural_strength_of_concrete_beam_lab_report.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/is_wgn_conservative.pdf
    • https://uploads.strikinglycdn.com/files/8929c37d-e8ca-44ed-a070-efcc5e0cabc7/70556416857.pdf
    • https://s3.amazonaws.com/rimepusox/miterir.pdf
    • https://uploads.strikinglycdn.com/files/7ca91d2b-58e2-4ab5-989a-d7ef4ae6e278/rizubiso.pdf
    • https://uploads.strikinglycdn.com/files/9eedb37d-d279-49bc-b4a6-7d6429757fea/dorian_gray_paint_undertones.pdf
    • https://uploads.strikinglycdn.com/files/d26f80ee-f4c5-4224-a122-742468aa914e/rusod.pdf
    • https://uploads.strikinglycdn.com/files/3c994721-5556-4ca2-b084-036c75d44452/86423856976.pdf
    • https://s3.amazonaws.com/miwolezedubujoz/gym_training_log_template.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_off0000f2f8.bin
48937b9836c79a124afac0e84e5dec3e97c893e952247c135e91501f38aaf8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 5424 bytes
font_01_sfnt_off00010557.bin
64a387c3cb3b9146d41cadace451a164191b815853f5186bc07895b0bc6389fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 11928 bytes

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