Malicious PDF — malware analysis report

Static analysis result for SHA-256 34292472b8c0e1a7…

MALICIOUS

PDF

76.9 KB Created: 2021-04-08 07:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 303481f287f6f5246d7961f20d4a4ac5 SHA-1: 899c9ea97a84a68724455bcbdb884abc381152ac SHA-256: 34292472b8c0e1a79cb1ef653bd621d045ae1b2d27479899512a524a1ea33a72
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that directs to a suspicious domain, flagged by heuristics as an external URI and part of a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI in a malicious PDF is a common tactic for delivering further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/123?utm_term=nice+guidelines+mental+health+treatment
    • http://iminn.ru/39513839225i5o2j.pdf
    • http://nature-ital.space/dual_fuel_inverter_generator_for_rva5efp.pdf
    • http://aycotoro5.xyz/algorithm_flowchart_pseudocodeskkqj.pdf
    • https://cdn.sqhk.co/vefomatakin/iapethe/vikekixuxufojodapojisok.pdf
    • https://cdn.sqhk.co/koporikog/Ahfgjje/12952897067.pdf
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60401c6b66593.pdf
    • https://static.s123-cdn-static.com/uploads/4483362/normal_5ff8acd25cd44.pdf
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5fe3adf148697.pdf
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5fd9ac8adcbd8.pdf
    • https://cdn.sqhk.co/dosakupu/eOGaigJ/43697527646.pdf
    • http://vakotuwudar.22web.org/free_speed_test_internet.pdf
    • http://choosemadam.site/kirujiririxufiravif69rhs.pdf
    • http://wazowil.22web.org/42792573814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nivajunupoz.epizy.com/39773344473.pdf
    • https://uploads.strikinglycdn.com/files/3496c9ce-a2f9-49db-905d-7c0d3dd8ab30/31089707696.pdf
    • https://uploads.strikinglycdn.com/files/c14a6719-51ec-498c-96d4-ad0c22ff702d/infinitely_repeated_games_discount_factor_example.pdf
    • http://lirepemewepe.rf.gd/1548116773.pdf
    • http://ravakalamixalu.epizy.com/betheme_header_builder_plugin_free.pdf
    • https://uploads.strikinglycdn.com/files/81c69275-082c-47bb-9d56-ad2266fb25ee/95300988802.pdf
    • https://uploads.strikinglycdn.com/files/b421083a-c14c-4560-8a58-1dbce91ec294/32594818072.pdf
    • http://xewenofos.epizy.com/incomplete_dominance_practice_problems_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/a7cfad21-15bd-43d1-88f9-43d475970da4/whats_the_word_for_touchy_feely.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_off0000f0eb.bin
ac29031e7277cba2e45998f089d2e5ad1f77ded801a0da6b907911526d548e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 5320 bytes
font_01_sfnt_off000102da.bin
02a1baa48e049f2d3a3827844fa89ed02c7ea7db4b232a42d63a8ad79046a06d
pdf-font-stream PDF embedded font (sfnt) at offset 0x102DA 10320 bytes