Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b3395524491124…

MALICIOUS

PDF

65.7 KB Created: 2020-12-01 08:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 1154d3e13c004f712fea3f71ac680c3e SHA-1: 520d7778249828ced61d5e406ac67216a0f5f26f SHA-256: 24b3395524491124ad073c6c171554495534db0393f8b50b45ec7933eb25601b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=oracle+mission+statement'. This URL is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=oracle+mission+statement In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f9965a27971f.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/zupenafud/71844766121.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/ema_approval_olaparib.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/what_is_the_purpose_of_math_club.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/broncos_depth_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ddda16c-10ca-44a1-86b5-7416c2c34dd2/50339115270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d76089-2c9f-4dc7-a7e3-9ace35273008/93062412945.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/zulexavojowurogatajedo.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/5350325259.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/chromosomal_nondisjunction_disorders_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d019e5c-a66a-4fc6-a960-855e2e89ed52/rexaxopuxukewimubuletadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945e5b73-e65a-49fc-b1cc-5649011646f3/return_man_2_flash_espn_games.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_off0000c460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC460 4972 bytes
SHA-256: 0f5f2b843bbae2f235778148731f6e90dc36cdbcbdcfb6ac82e2841eea06968a
font_01_sfnt_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 11068 bytes
SHA-256: de4e58b6010a9d58e463daf142518d93b98d2ee8b4ee20449bf6f18102223d87

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