Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f0cc5c96aa3274…

MALICIOUS

PDF

77.4 KB Created: 2021-04-14 01:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 702b458fcebe973db7b95be80aa88ec5 SHA-1: 4f1fd13c2d26f14886b9912d545d05bb131b1688 SHA-256: 84f0cc5c96aa327427d29cdd57d5ff16b1d9a0d6b114e27bf0af22381a62a9e6
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, one of which is explicitly flagged as an external URI related to 'Stihl replacement parts'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous URLs suggests the document is designed to redirect the user to malicious sites.

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://jumiwimov.ru/strik?utm_term=stihl+autocut+25-2+replacement+parts
    • http://dorugesile.iblogger.org/ipa_consonant_and_vowel_chart.pdf
    • http://saduzemed.mypressonline.com/folic_acid_rich_foods_list.pdf
    • http://favowavuwoxi.iblogger.org/rivejakesinotigexoweli.pdf
    • https://wemizufatevovig.weebly.com/uploads/1/3/4/8/134896488/c9cee3888.pdf
    • https://cdn-cms.f-static.net/uploads/4377908/normal_602f57ad34d34.pdf
    • https://siselujasukoju.weebly.com/uploads/1/3/0/9/130969984/bc7e9b1876f4f8.pdf
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5fe2a68d64c15.pdf
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5fe1b1bb856f3.pdf
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/6551298.pdf
    • https://pujazoja.weebly.com/uploads/1/3/4/8/134880569/panexari.pdf
    • http://fukiwurezopukof.mywebcommunity.org/nubepamovuzaku.pdf
    • http://kolekewoni.mywebcommunity.org/sewuraz.pdf
    • http://melomone.scienceontheweb.net/why_is_my_ellipsis_jetpack_not_working.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2b55a4ec-4d48-4131-a1f6-c0fa761d30cc/virakedaveligodamibegu.pdf
    • http://fazofaz.epizy.com/werukedevudulojagifekax.pdf
    • http://nununad.myartsonline.com/briggs_and_stratton_550ex_carburetor_parts_diagram.pdf
    • https://uploads.strikinglycdn.com/files/3d11611d-2d62-43c9-93b8-19a69c28d571/calculate_my_vedic_sign.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91a.bin
08d27a3b1e0a658c8b81068685d457408b5177eb5af16633e795375226de10a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 5564 bytes
font_01_sfnt_off0000ebe1.bin
894402233c6aa5176e0d9bb217516afb6dd47b5cd1edd12eeaf9b9b57bab6a56
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 11768 bytes
font_02_sfnt_off00011423.bin
1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11423 16140 bytes