Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fe5b2b3a6a0081…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 05:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bfb813048793f6e01a41226983bab8a SHA-1: 1c8f2a21ab154ba29b3e78717df2111fae0d9458 SHA-256: d8fe5b2b3a6a00817758a9263d79e9c67903ba72d30f472e4e87b0b8d34ceae4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the PDF content suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

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://dafemum.ru/wix?keyword=nightmare+before+christmas+back+seat+covers
    • http://waystep.site/61079230088bctmf.pdf
    • http://storergoods.site/63323478088vhlbo.pdf
    • http://espaceabone.com/28900561238xbfpx.pdf
    • https://cdn.sqhk.co/tejosepu/C6IjdKV/60922535239.pdf
    • http://nikaold.site/homelite_super_2_carb_settingsj794b.pdf
    • http://vittorguxx.site/formal_definition_of_famishedty1d7.pdf
    • https://cdn.sqhk.co/vorebilifi/ijiazhb/kizigije.pdf
    • http://nezatarofarix.getenjoyment.net/matofowesate.pdf
    • https://cdn.sqhk.co/zesonixiv/bghjcjf/general_custer_battle_of_the_bulge.pdf
    • http://itdiscount.pro/numpy_python_3._4_64_bitk9i29.pdf
    • http://goladelexugezi.sportsontheweb.net/91368007899.pdf
    • http://tiriruno.sportsontheweb.net/apollo_munich_optima_restore_policy_wording.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://degevojorak.myartsonline.com/debesevemumifud.pdf
    • http://futikuzita.onlinewebshop.net/professional_asp.net_mvc_5_free_download.pdf
    • http://sadozejeko.myartsonline.com/what_is_pentair_freeze_protection.pdf
    • http://tekarileted.epizy.com/canon_pixma_mg3120_ink.pdf
    • http://dadojusox.epizy.com/vidagemojowuluxo.pdf
    • http://xixujoteb.epizy.com/zabiteb.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_off0000ea76.bin
004d10905987f5c6237e8ec46ff8fbd034c0d9ef66cb24cbdf17886b5f7e72dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 5496 bytes
font_01_sfnt_off0000fd0b.bin
30e58dc8a1fecebed17cc92d9866b7705ad0dd2d482e16afc465770c1533a418		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 10772 bytes

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