Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7ac269ad76ea6c…

MALICIOUS

PDF

110.6 KB Created: 2021-05-02 13:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bbe6d0af97d58312bb599ea17825bcd SHA-1: 766a36fb61635daeb5a7e616fa1ba7c9c33a3f43 SHA-256: 8f7ac269ad76ea6cb6b23daf9703e3f6886e6fac512bdb5432f5b40f88a29f1a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious download or phishing page. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the ClamAV detection suggest an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://kuzutuzo.ru/strik?utm_term=warhammer+fantasy+books+pdf
    • https://cdn.sqhk.co/dubikureta/jaajbjb/ethyl_chloroformate_decomposition_products.pdf
    • https://cdn-cms.f-static.net/uploads/4417045/normal_601703d62e3b7.pdf
    • http://potoborotagivud.22web.org/antivirus_pro_apk_full_version.pdf
    • https://static.s123-cdn-static.com/uploads/4480591/normal_600013f001a3d.pdf
    • https://cdn-cms.f-static.net/uploads/4370542/normal_600e9b04d79a6.pdf
    • http://xogosedo.iblogger.org/5953628412.pdf
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fc7d78b48727.pdf
    • https://cdn-cms.f-static.net/uploads/4454429/normal_606e952034643.pdf
    • https://cdn.sqhk.co/wuzutuse/ieVgihd/gepamamumaziluvefoluk.pdf
    • http://luxomozuk.mypressonline.com/java_8_lambda_expression_tutorial.pdf
    • https://static.s123-cdn-static.com/uploads/4374013/normal_6007b27f5f567.pdf
    • https://static.s123-cdn-static.com/uploads/4386839/normal_5febedd06d973.pdf
    • https://cdn.sqhk.co/sumavevop/bjtjeia/80252131446.pdf
    • https://static.s123-cdn-static.com/uploads/4380379/normal_5fdf319b859b0.pdf
    • https://cdn.sqhk.co/wikaraxixi/QhfhcJg/free_local_police_scanner_apk_download.pdf
    • https://cdn.sqhk.co/puwukuwos/heFidIP/network_marketing_success.pdf
    • https://cdn.sqhk.co/loxusovi/ibwAnDD/wukisepawemirobupabutus.pdf
    • http://tejaberi.iblogger.org/kotojidukujarel.pdf
    • https://cdn-cms.f-static.net/uploads/4487186/normal_5fd2c01ebe3f6.pdf
    • https://cdn.sqhk.co/jarogofef/6bhfxgI/wilikobusexoral.pdf
    • https://cdn-cms.f-static.net/uploads/4405930/normal_60336b8e31909.pdf
    • https://cdn.sqhk.co/pepitaji/tgivhbO/colored_bumper_plate_set_in_stock.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tezadoni.rf.gd/pemike.pdf
    • http://segimoto.myartsonline.com/binomial_distribution_exam_questions_and_answers.pdf
    • http://sajomapujozokux.onlinewebshop.net/ps_vita_lowest_price_in_pakistan.pdf
    • http://manosotidokef.myartsonline.com/autocad_converter_free_download.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_off00017433.bin
b63198eee0f76cd92b8e8e0faf7e7aafe902d859a4729e6ec9a5e3e55449043c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17433 5568 bytes
font_01_sfnt_off0001870a.bin
50194da4afacb686426bb44028f45e816959d917d9c271a69aa8f652bd9bd0f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1870A 10868 bytes

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