Malicious PDF — malware analysis report

Static analysis result for SHA-256 653ed8dec98ba2f9…

MALICIOUS

PDF

82.9 KB Created: 2021-03-19 05:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca7e5b4fc85b7704ba93243df708005f SHA-1: d4c09b86c09ace5769ba7845238dc67d01dfb0ce SHA-256: 653ed8dec98ba2f9b02f9d2d61ed0d6aa924490b414b39a90a7c6178d455977e
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 URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body text, though partially garbled, includes keywords that might be used in a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=southwest+sufi+community
    • http://freshka.fun/2009_ktm_450_exc_owners_manualmpxm9.pdf
    • https://cdn-cms.f-static.net/uploads/4374203/normal_60443e686abb3.pdf
    • http://cenderaoriginator.com/67884479753s8h0r.pdf
    • http://kafujaguvo.mygamesonline.org/lokanutuduguwatuliwux.pdf
    • http://pugorot.mygamesonline.org/percy_jackson_books_best_to_worst.pdf
    • http://joblanc.xyz/whats_functional_strength_training_on_apple_watchuvief.pdf
    • http://regsenatvumen.website/aorus_gaming_7_z370_manualr3fs7.pdf
    • http://aycotoro0.xyz/corrosion_engineering_and_cathodic_protection_handbookyi9ob.pdf
    • http://tertov.xyz/62223767145hg9pv.pdf
    • http://dofujifeluradep.medianewsonline.com/ipega_controller_9023_compatible_games.pdf
    • http://bijowuxupolapi.sportsontheweb.net/86290213032.pdf
    • https://cdn-cms.f-static.net/uploads/4369671/normal_60540a8870711.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nisetekotixob.myartsonline.com/hopeless_colleen_hoover_spoilers.pdf
    • http://kofaxafogi.myartsonline.com/tibijejazemanegesobiror.pdf
    • http://vujuvisesakok.myartsonline.com/top_25_iot_startups_to_watch_in_2020.pdf
    • http://farudigenudoze.onlinewebshop.net/farmakologi_ampisilin.pdf
    • http://pujumek.myartsonline.com/32_bit_address_size.pdf
    • http://wudemexa.myartsonline.com/adobe_premiere_pro_price_one_time_purchase.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_off0001068a.bin
22f6c24c89900a5adb61d819963e766ce9cc5850e3947669e1dd2b703c676418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 5080 bytes
font_01_sfnt_off000117d0.bin
bb0ebf3d161879c46abb22c3dd370990b6f2181a2af9daacb6aae93fc8c8a383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117D0 10924 bytes

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