Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94480e785a2e3b2…

MALICIOUS

PDF

73.0 KB Created: 2021-01-08 11:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: db7cd4173ee7acf3e0fcb3004bc7f189 SHA-1: ade23ba9cc454247b8117577b8c33e670dee8df7 SHA-256: e94480e785a2e3b2e94d29e42f9d671dc7489b08b83dd04d9f11ce8f75a36e3e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=ozark+trail+3+person+dome+tent+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376606/normal_5fec28bc079ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5fa061f22b589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421764/normal_5ff7131aa636b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386834/normal_5fe25a437a8c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384030/normal_5fcce02876d30.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/dategowikemus_ropoxuropipo_muvezabav_giduxesolaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480893/normal_5fe56510827d5.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/445e6868-7f01-4a61-9f23-0c7204ea46f9/delizazanofusufeti.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/71390114869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151a6a02-ec26-4ed9-ba5a-85cf973ab23a/37095986116.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/attrition_analysis_ppt_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/hrm-_performance_appraisal_process.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/comparatives_superlatives_esl_worksheet.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 2984 bytes
SHA-256: 54ff8bc911ce8fd6717908f876d40983c13eb30a7583e0638df4048e5fc90268
font_01_sfnt_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 5524 bytes
SHA-256: d46d6e6e18fc2ae02e7eb13ecde32a49dc99f9aebab7bbaf11562df19d042a86
font_02_sfnt_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 10460 bytes
SHA-256: fab8030afd80363479e33678e20c89f31537e42be8b4cbb1da65f759f3d51b46

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