Malicious PDF — malware analysis report

Static analysis result for SHA-256 acae370b190cc8a2…

MALICIOUS

PDF

65.7 KB Created: 2020-12-14 23:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b8a8c4adf0168e8da062bfec662a902 SHA-1: d68bb5ff53dff9110975307b743c5b7da2adb794 SHA-256: acae370b190cc8a214066995db9df5d6021ba61727bafbaa6989e8656437fab9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains an embedded URL pointing to 'traffset.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'Hunger games study guide answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=hunger+games+study+guide+answers
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fbc03407d2b1.pdf
    • https://static.s123-cdn-static.com/uploads/4411246/normal_5fc851fddce0b.pdf
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5fcf06a466423.pdf
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5f92e1cfa8f39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jupudizadid/jquery_ajax_request_format.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee65f3de5e49b5291617/1606282854478/persona_3_kenji.pdf
    • https://s3.amazonaws.com/newopetusam/how_to_make_a_fake_drivers_license_online_for_free.pdf
    • https://s3.amazonaws.com/vapite/docker_hub_image_manually.pdf
    • https://static1.squarespace.com/static/5fc4d5be12facd59cec62577/t/5fd18b6b9a9e5443ac73f81b/1607568235598/wudadikuzefibixutoxejud.pdf
    • https://static1.squarespace.com/static/5fc68d0568612547ed851436/t/5fcbc2207ab0f364abb4715c/1607189024249/best_psp_games_to_play_on_ppsspp_emulator.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_off0000c423.bin
09f41adff47148de094487bb41ad569ff7f472dee7fa19c3d21230d0e7114a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 5268 bytes
font_01_sfnt_off0000d60e.bin
aec182eb3d1c2df34f876afd9a23376a46a25c8882bdc05c3cda1faf4e00f10d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD60E 10648 bytes

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