Malicious PDF — malware analysis report

Static analysis result for SHA-256 30008287b47d0127…

MALICIOUS

PDF

77.6 KB Created: 2021-05-04 09:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 126c5af2cc3ea6ffe691b727c4431f89 SHA-1: b101c5a8ee03b76cc2028134242c336248962438 SHA-256: 30008287b47d012763c286f06710aeced50969226d9518f99c52d5bf5a1a40b3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, 'jacksth.ru', which is flagged as malicious by heuristics and ClamAV. The document body, though heavily obfuscated, contains text related to Australian wildlife, suggesting a lure to disguise the malicious intent. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://jacksth.ru/strik?utm_term=tawny+coloured+wild+dog+of+australia
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fcad5449375b.pdf
    • https://cdn.sqhk.co/galemojubemo/dShblih/best_online_course_to_learn_to_sing.pdf
    • https://cdn.sqhk.co/loziromegon/haib8he/56633531005.pdf
    • https://cdn.sqhk.co/wojusipi/jtm4Uhd/feluzabagigavuzelede.pdf
    • http://lifegirls.site/909354833733ntm9.pdf
    • http://lesantyqas.online/dikinufikaw6lfc9.pdf
    • https://cdn-cms.f-static.net/uploads/4376354/normal_6033f30802041.pdf
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fce8ecb4f7cd.pdf
    • https://cdn.sqhk.co/mofijovelu/ggVjfji/navneet_kumar_gupta_insolvency_professional.pdf
    • https://cdn.sqhk.co/kajipazuto/0jiUiff/36202965468.pdf
    • https://cdn.sqhk.co/naxudufejik/eSigiga/arabic_malayalam_dictionary_free.pdf
    • https://cdn-cms.f-static.net/uploads/4369932/normal_60252697bfd4d.pdf
    • https://cdn-cms.f-static.net/uploads/4416786/normal_602ae705e7617.pdf
    • http://iblack.space/arnold_sonatina_clarinet9pi6k.pdf
    • http://newsportstechnology.ru/vikibotuu5yq2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/01a69587-7ee6-430b-bf1e-b661ca749c69/how_to_restart_a_wall_heater.pdf
    • https://uploads.strikinglycdn.com/files/70f51df1-1a0d-460d-833c-ca38fa5cfe8c/what_are_the_types_of_operating_system_and_their_functions.pdf
    • https://uploads.strikinglycdn.com/files/9e8d9a77-3a2b-426c-b2fd-c3b13c811edf/35405824138.pdf
    • https://uploads.strikinglycdn.com/files/f0cf8b03-f321-4ba6-8a33-59cb0ce2e238/nazim_hikmet_almanca_iirler.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_off0000f377.bin
28fe828c120af1c15fe55457fc88b3a3f401600ab04e308adf5606601667ec6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5332 bytes
font_01_sfnt_off000105c8.bin
e2b2877a64313e4ba504ff4093dc8510a9898423faee60606aba2035542e5da0
pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 10448 bytes