Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28cae5132a45406…

MALICIOUS

PDF

61.9 KB Created: 2021-01-08 16:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 301a5a6a7b28f1a30780b880bd32a46b SHA-1: e6f52abe2e724b60cb2c4e42f654ae5ba9f41514 SHA-256: e28cae5132a454062d9caefa1a7a8e6ceff396319066627c512cdc63a1cae3da
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external links, indicating a link farm strategy, likely to direct users to malicious websites or download further payloads. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://traffnew.ru/123?utm_term=dan+russell+rodeo+arena PDF link annotation
    • https://cdn.sqhk.co/tagorotage/jg4genI/rezegopusixo.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/SYidD1t/probabilistic_risk_analysis_foundations_and_methods.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5fdc53ec11fff.pdfIn PDF document text
    • https://maraduwiz.weebly.com/uploads/1/3/4/3/134363873/kijugafo_wadisuwivida_votaxuluji.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/1371c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd66ee7-bb6e-4c94-bfb4-7f9913002b4f/wagonud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dce4a79-7524-4221-9899-43902d865619/petukikafebemiwipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d92f50-c9ef-4d67-9495-67849768e742/blender_intro_templates_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657d5cc5-3ed3-4a8a-a1c1-9903b2c0b962/22871413384.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_off0000b615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB615 4816 bytes
SHA-256: f701bf92af56556238b4a3cffa3ee7944d0f1faf5e24498086d6dc7e8cb15bd8
font_01_sfnt_off0000c683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC683 10904 bytes
SHA-256: 524cbaf5cec4618f4042b5c1b3157bd69e2aa9286325ff94454731f55c977921