Malicious PDF — malware analysis report

Static analysis result for SHA-256 995fcd83a17fa860…

MALICIOUS

PDF

71.4 KB Created: 2021-03-19 14:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7cffb8208392e5db1579575821ade06 SHA-1: 7dce6c66e3b18c0903f5fd8e3538420cc206d61d SHA-256: 995fcd83a17fa860a969fe2615e733b94a953e15fead3511479bc60ac72984d6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to a phishing domain, suggesting an attempt to redirect users to a malicious website. The document body, though heavily obfuscated, contains keywords related to manuals, aligning with the phishing lure.

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://seumenha.ru/wix?keyword=definitive+technology+cube+manuals
    • http://hr-insider.com/circumference_and_arc_length_worksheet_answer_key61p0o.pdf
    • http://site-shop.xyz/43811617087srccf.pdf
    • https://cdn-cms.f-static.net/uploads/4496170/normal_6015da3d36c68.pdf
    • https://cdn-cms.f-static.net/uploads/4448330/normal_5fea2df3aba4c.pdf
    • http://penoligis.22web.org/fokudofujawulivanogi.pdf
    • https://cdn-cms.f-static.net/uploads/4478415/normal_60124f0999c55.pdf
    • http://diwokaxojizo.iblogger.org/political_psychology_noun.pdf
    • https://static.s123-cdn-static.com/uploads/4482218/normal_5ff89071cbb85.pdf
    • http://wogavuxemadirof.iblogger.org/kepumigeva.pdf
    • http://nisiwitas.22web.org/woruridezujonopa.pdf
    • https://cdn-cms.f-static.net/uploads/4480174/normal_604d8873839cd.pdf
    • http://wedasuf.getenjoyment.net/pojax.pdf
    • http://kelnoteres.xyz/waroxolaxomu5eqh8.pdf
    • http://bajoreto.sportsontheweb.net/81814742254.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sebokegekesuded.atwebpages.com/can_i_sell_food_from_my_house_uk.pdf
    • http://gamotaganewo.epizy.com/ruzifiwab.pdf
    • http://kosezofejesuxef.atwebpages.com/chlamydia_pneumoniae.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_off0000d692.bin
5737acf5ba5e6e507f6f6b75cd632c8518ffaea34eaf74529c76133109cdfcf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD692 5500 bytes
font_01_sfnt_off0000e940.bin
f0ebbf6fdf76d880cde5875a6174bfe1a17abd30e793e0c4c3e68959061ea458		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 11124 bytes

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