Malicious PDF — malware analysis report

Static analysis result for SHA-256 308486ff003315ad…

MALICIOUS

PDF

69.8 KB Created: 2021-01-16 06:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1072cc5e2b643c6f04e1c34c9cc428a4 SHA-1: a41315dace7d6be5db50931accc2aa22adee3a38 SHA-256: 308486ff003315ad5a3022b9ce04bc1af67963afbcd09a57869b06d44d1e08cd
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a link to a known malicious redirector, and also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update, a common tactic for malware delivery or credential harvesting. No scripts were extracted from this sample, but the embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://gettraff.ru/123?utm_term=las+partes+de+un+termino+algebraico In PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/43a349bf4de6ea5.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/bd3b356e5.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/eXVSid9/23449670885.pdfIn PDF document text
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/4432800.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/375014.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/ahjmhfP/64714124411.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/hchhEic/dunk_perfect_basketball_james.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/mudurixo/latuwudomeferiwizevobed.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/5980543384.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/cisco_ise_2._3_evaluation.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/evozi_apk_er_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/75623811688.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_off0000d1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 5476 bytes
SHA-256: e127572246d4d2d8a2c2232b988bd2ebead5da524012b92ec37f60457a2468a5
font_01_sfnt_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 11172 bytes
SHA-256: 95f57746abab7ddb59506cce790303122867ce7b8ea5d09393e676808607f0d5

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