Malicious PDF — malware analysis report

Static analysis result for SHA-256 24228637775fda23…

MALICIOUS

PDF

84.7 KB Created: 2021-03-06 23:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 18114aeae699b8cfaeb4bc8b686aa851 SHA-1: cbeb3f3106b521fd8260d74b7dd18e8266a7b8c0 SHA-256: 24228637775fda23078a579579f1069e3399e2b1cb70551a94af07bbbc99aa63
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a mass external link farm, with a primary suspicious URL pointing to 'vilenefex.ru'. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=plt+scatter+legend+color PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5fd2c07029114.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/b1f7130fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_6031d7cf164bd.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/dAgehdM/9343474071.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/dZgdhdN/gusanamekumezoxemifesuze.pdfIn PDF document text
    • https://netafipagugid.weebly.com/uploads/1/3/0/8/130814009/lubifu-vewavuliwadek-notukifojovin-pukowopaba.pdfIn PDF document text
    • https://cdn.sqhk.co/muribirigim/lgdpgdZ/80475901660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449009/normal_5fe49ba94cc38.pdfIn PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/6297312.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/alVOifM/17531977482.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/uvghhhQ/shooting_arcade_games_for_sale_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_6017085681d62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453741/normal_5ffbaf64d520c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_7bf91f43ee1448948f599e67a0b7ee23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jobavo/fevifuze.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/22035907594.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/difference_between_financial_statement_and_audit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/sanolevarulogef.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/62551815303.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/62669040599.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/modafasa.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/brushless_dc_motor_theory.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_abd46fd48d814327bcd059b4ff1d29a0.pdf?index=trueIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_37d27b21574f448b8fafaf325d4fef4c.pdf?index=trueIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_4e73143f93bc4d408070e00994350302.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_7b7cd06cd8f64babb4e663980390bb3c.pdf?index=trueIn 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_off00010e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 5108 bytes
SHA-256: e6802549d6aba3ad8ba295f4c645db3c78f64016435ea5c017787d1cabb7ea2a
font_01_sfnt_off00011f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F95 10996 bytes
SHA-256: f9561746d57a7c88e460e696083c2b1da6d873faf331f17dcd33426659e0ead7

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