Malicious PDF — malware analysis report

Static analysis result for SHA-256 773ce67aeeb2113d…

MALICIOUS

PDF

73.6 KB Created: 2021-02-14 06:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ee657fd4efd813a484d9a1158df4ab9 SHA-1: 9966f176c9b68673f1eb055c8a8e1cc645eedba6 SHA-256: 773ce67aeeb2113d07b23a71baecef85645d2b9d6ffa5f953f8e797ef20b62cf
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple embedded URLs, one of which, 'https://druttle.ru/wix?keyword=teclado+logitech+k520+manual', is likely used to redirect the user to a malicious site. The presence of embedded URLs and the overall detection suggest an attempt to trick the user into downloading further malicious content, aligning with a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=teclado+logitech+k520+manual
    • https://cdn-cms.f-static.net/uploads/4468267/normal_6025a82483480.pdf
    • https://cdn.sqhk.co/fimegasaz/XTghK8W/pifonive.pdf
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fda447ce0b30.pdf
    • https://cdn.sqhk.co/tejurorado/ciihfhd/birthday_cake_theme_ideas.pdf
    • https://cdn.sqhk.co/golemejexeno/egjcoUy/23701512814.pdf
    • https://cdn.sqhk.co/rukokota/ifNjgUv/wiwiviwonaro.pdf
    • https://cdn.sqhk.co/pulafefer/pmPxEgc/nunevogabokik.pdf
    • https://cdn.sqhk.co/lumolixuwo/ihgicIo/american_president_debate_2020_live.pdf
    • https://cdn-cms.f-static.net/uploads/4404727/normal_601ec5185dae5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefipa/buy_acetate_sheets_nz.pdf
    • https://s3.amazonaws.com/zonivezada/24880436325.pdf
    • https://s3.amazonaws.com/tipikaxe/bcd_addition_and_subtraction.pdf
    • https://s3.amazonaws.com/rejiner/mikude.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_off0000e1ea.bin
05cba0996587ccd6ca45c9fb83433b7b4f7267a8c7741416f0dc4ec62f8a0a49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 5488 bytes
font_01_sfnt_off0000f479.bin
0fca4fc489d7c07b7e9820c89a7eec6dceacf227de86e8a350ec0854296ad4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 10812 bytes

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