Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93c8e9b2d751da6…

MALICIOUS

PDF

73.2 KB Created: 2021-03-28 04:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d725bcb4ed8e2743cca44d7ab294b7c SHA-1: 26b0ae6e5801a2fc5cc7febc08408082a28f4e08 SHA-256: f93c8e9b2d751da6a1c8904c03408737ecf75b3e9b413cfee681dacd52115a10
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common technique for SEO poisoning and phishing. The embedded URL `https://mezovuduw.ru/wix?keyword=guess+up+emoji+answers+level+93` suggests a lure related to a popular game, aiming to trick users into visiting a malicious site. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=guess+up+emoji+answers+level+93
    • https://cdn.sqhk.co/bufudoraxala/jfhi2gh/hexion_holdings_llc_stock.pdf
    • https://cdn.sqhk.co/wibetaxor/ja8ghUJ/life_simulator_3_vlogger.pdf
    • http://ritibaj.22web.org/82725307978.pdf
    • https://cdn.sqhk.co/silijebutu/iNjayrm/bendy_mod_menu.pdf
    • https://cdn.sqhk.co/rubuxupab/WjhgMSb/bakuvatepatazi.pdf
    • https://cdn.sqhk.co/nixenexax/ji5hehc/6125928728.pdf
    • https://cdn.sqhk.co/pigexebobe/G9CiaLf/godasoped.pdf
    • http://wedavinonuvovu.22web.org/cerebral_venous_sinus_thrombosis_guidelines.pdf
    • http://gokutep.22web.org/98038820775.pdf
    • https://cdn.sqhk.co/miwizawi/gjgjieP/metric_conversions_worksheet_ii_answer_key.pdf
    • https://cdn.sqhk.co/xidizizo/6hgghgc/tapipusunile.pdf
    • https://cdn.sqhk.co/temirikuji/bHiiYif/vitegituwokeja.pdf
    • https://cdn.sqhk.co/jalizovi/RBh3YND/28984046878.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fadadedezeker/khalil_gibran_o_profeta_frases.pdf
    • https://s3.amazonaws.com/ravuxudibure/23824441099.pdf
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_ab40bc3b022d49b98ae9ff8f21821598.pdf?index=true
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_9d6c1c97eb6a46c68a0fd230172538b1.pdf?index=true
    • http://pilulozames.epizy.com/network_connectivity_testing_report.pdf
    • https://s3.amazonaws.com/dubiditiginowo/39624314913.pdf
    • http://suvumudupese.epizy.com/york_chiller_manuals.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_off0000e193.bin
5d85ebabd0dfc3d4ac169f67096d67a6f8ad99a32775203b6f8921bf5f8933c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 5544 bytes
font_01_sfnt_off0000f46f.bin
fde248cfbe264263d7ccde121ac03a93dcc6f5416be93f792a134bcd08c41187		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 10196 bytes

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