Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea687565e2df273…

MALICIOUS

PDF

66.4 KB Created: 2020-11-13 06:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c5bb4072472e70539694720ab4164ad SHA-1: d5d2f9994e70cb620128f84f994040b028a782c7 SHA-256: 0ea687565e2df2730629d9eaad1603f51131a1cd3fe48db03a0a0d99f887217a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or distribution network. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=how+to+download+mods+in+krunker PDF link annotation
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/mawadem-golodozelel.pdfIn PDF document text
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/4829217.pdfIn PDF document text
    • https://bubawupuga.weebly.com/uploads/1/3/4/3/134380130/2467510.pdfIn PDF document text
    • https://gilawigegazimo.weebly.com/uploads/1/3/4/5/134520665/wotunoj.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/wabewubatesu_petegozuvoxi_nolim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiduro/39109092735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e263a10-5b87-46d1-b8d6-63266968e7cb/29993311536.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/62603763579.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/graphicriver_corporate_flyer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/madden_mobile_cheats_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tawegosebanajak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac55d66-f322-4a3a-ad36-0b45829e82e7/vmware_workstation_9_license_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87641bb2-3d01-4f2d-ba93-0366d8300098/92346294457.pdfIn 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_off0000c6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FE 5088 bytes
SHA-256: 304586f348cfa106e4daae119b6f93b56a2e20feef18e338071cbe4ec89e22c8
font_01_sfnt_off0000d842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD842 10780 bytes
SHA-256: 02a1c77be54fc39694e8aaab4025492dfcab22e7da01bd2f60d2be0c5e0a4d50

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