Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67a129e7110b58e…

MALICIOUS

PDF

72.3 KB Created: 2021-04-03 21:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d655bbf2760b185f8077191e45e97d8 SHA-1: 7ebc30a56f1f559bc031f1134783603eb0bbe823 SHA-256: f67a129e7110b58e05b6534eaf070e01911420798cc5db207350510c8c27c25b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs, specifically 'https://nipisod.ru/strik?utm_term=tippmann+a5+body+kits', suggests the document is designed to redirect users to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards 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://nipisod.ru/strik?utm_term=tippmann+a5+body+kits
    • https://cdn-cms.f-static.net/uploads/4412573/normal_60316e9f89e47.pdf
    • http://wazepewazivulil.mywebcommunity.org/catan_2_player_rules.pdf
    • https://cdn-cms.f-static.net/uploads/4412403/normal_6019367c885eb.pdf
    • http://mainsale.pro/sufotalisibofeferiphkzib.pdf
    • http://xofelivigavas.mywebcommunity.org/intermediate_time_table_2020_download.pdf
    • https://cdn-cms.f-static.net/uploads/4478123/normal_6016d9843ed64.pdf
    • http://welitizenowem.mywebcommunity.org/bankers_algorithm.pdf
    • https://static.s123-cdn-static.com/uploads/4490754/normal_5fef10015c180.pdf
    • http://iranianvc.com/ideal_beer_pong_table_heightaikdm.pdf
    • http://womizepivilora.sportsontheweb.net/how_to_find_your_sellers_permit_number.pdf
    • https://static.s123-cdn-static.com/uploads/4418590/normal_5ff362473e7b6.pdf
    • http://logawedulukudan.mywebcommunity.org/93722699274.pdf
    • https://cdn-cms.f-static.net/uploads/4413227/normal_600fff951c6ed.pdf
    • https://cdn-cms.f-static.net/uploads/4462345/normal_6034c20c9ce6b.pdf
    • https://cdn-cms.f-static.net/uploads/4427091/normal_602606b950cc2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://viwuwijagabote.myartsonline.com/lijazivopowat.pdf
    • http://xazopufegi.onlinewebshop.net/mobile_test_automation_with_appium_nishant_verma_free_download.pdf
    • http://faxevimisosideg.myartsonline.com/fapujoninova.pdf
    • http://zajupulavofawi.myartsonline.com/25990422021.pdf
    • http://bafuwujix.atwebpages.com/estrategias_de_comprension_lectora.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_off0000dc9a.bin
4b5de74b22deacde37792ac14fafe4f6ef369d9a505f84de9bb198e5851f9fba
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9A 5356 bytes
font_01_sfnt_off0000eec2.bin
be3e260c60856be2ef2697cd19ec6f0eb70c73b0bdc2632290ed8b95a65f7e12
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 11020 bytes