Malicious PDF — malware analysis report

Static analysis result for SHA-256 7710543711ab50c7…

MALICIOUS

PDF

76.7 KB Created: 2021-05-09 08:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a36035f016e662851ecd66815c3391e8 SHA-1: 5e94185c9e3edc63e82a5c643da15d8e8bc05238 SHA-256: 7710543711ab50c7cab5795968185e08564b419953f6b98b9dbd1d7a336f8830
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 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a document.

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://zajinet.ru/strik?utm_term=anders+breivik+manifesto+deutsch
    • https://cdn-cms.f-static.net/uploads/4476294/normal_603e757f4081e.pdf
    • http://iranianvc.com/i_was_sitting_at_the_counter_lyricsjjx0r.pdf
    • http://mevukavotidu.getenjoyment.net/56967744433.pdf
    • http://naturfresh.space/69847606085sma30.pdf
    • https://static.s123-cdn-static.com/uploads/4476927/normal_5fef47adcc813.pdf
    • https://cdn-cms.f-static.net/uploads/4477173/normal_602efcd6f0f1c.pdf
    • http://bcpreactiva-enlinea.com/33696125874pol8.pdf
    • http://kopalirigel.mypressonline.com/bimumobirunetomuveka.pdf
    • http://vuvabadiredowa.getenjoyment.net/calligraphy_tutorial_free_download.pdf
    • http://neojust.ru/nojusuzonapexulesomogflbeh.pdf
    • http://wobafobigo.mywebcommunity.org/46007507722.pdf
    • http://pimifawimonidij.mywebcommunity.org/xagapiwamojidotijimo.pdf
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fdc23bd11879.pdf
    • https://cdn-cms.f-static.net/uploads/4474999/normal_606d6b0b7127e.pdf
    • https://cdn-cms.f-static.net/uploads/4382406/normal_606b3e9e9bbc0.pdf
    • http://jajuviramigawo.medianewsonline.com/finance_for_dummies_australia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gajopule.myartsonline.com/zabagoda.pdf
    • http://gizixaxeviduf.myartsonline.com/autocorrelation_test.pdf
    • http://jatoxat.atwebpages.com/cadastral_surveying_books.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_off0000e8da.bin
210ee6236a2af38c48b12e25cb4c3125ca880eed4570f5351fffdb3ba4bf5b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 5480 bytes
font_01_sfnt_off0000fb5b.bin
78dc33b042a4fb3e9725f77f078d7b70d69af28cc10b31bbac88e189898b3dbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 13080 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.