Malicious PDF — malware analysis report

Static analysis result for SHA-256 68408b0ec2a3348e…

MALICIOUS

PDF

74.3 KB Created: 2021-02-18 18:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cbb2db3bdf8c5cb582f9a6399697dde1 SHA-1: 96ebfb3d030d5fb9938afc6d285a67d5bbb91d96 SHA-256: 68408b0ec2a3348e27a18d0f060ce8688106496b109872ad528180fb225efce5
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host phishing content or a secondary payload. The document body, though heavily obfuscated, suggests a lure related to pregnancy and back pain, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=why+is+back+pain+bad+for+pregnancy PDF link annotation
    • http://zalavsky.ru/67633734352b4tzu.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/bgeifZf/temovube.pdfIn PDF document text
    • http://kmplitka.shop/484527820040q4s6.pdfIn PDF document text
    • http://shoop-fo.ru/xutuzevuzexokegiduxehfmil.pdfIn PDF document text
    • http://cherrypimp.online/british_sign_language_dictionaryull4k.pdfIn PDF document text
    • http://ericksandoval.com/81684019943rtyue.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/hgjbbvr/kezovu.pdfIn PDF document text
    • http://fb-pageunderreview.com/foxonahifd6.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/jjyugho/child_care_licensing_california_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/epieYhd/case_simulator_critical_ops.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kovezux/microsoft_word_brochure_template_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/angular_8_formbuilder_example.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/crescent_lake_fl_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/how_to_drive_automatic_car_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/bulerias_guitar_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/agropolitan_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/minigapon.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5704 bytes
SHA-256: f32c8746a0f8655aa9f4552c047020d87e654c174ac286a07e1d2d3bc202bacc
font_01_sfnt_off0000f78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78F 10156 bytes
SHA-256: 50d2e6a170372353035564d5fb10d6996d1c6da75a39b08803fc6b4157319f2e