Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63af0e31019fda7…

MALICIOUS

PDF

65.5 KB Created: 2020-11-19 01:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fed37d5dceac1461552920e797c03d58 SHA-1: 2b61286e0c69a241d85ca516aee240cc1fb43f0d SHA-256: b63af0e31019fda777b51f1cde25d01e08c649ed793446805961627583cdf490
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-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://trafffe.ru/strik?utm_term=tariq+nasheed+the+mack+within+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5fa22be59cde0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5fb2afe22720e.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/tetakidivikev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_5f945570e01ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_5fb59fd1399ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f8f17e738928.pdfIn PDF document text
    • https://likuxosudiva.weebly.com/uploads/1/3/4/6/134603152/vajilozalomug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_5fabacdd98c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_5f98ccf4ca31a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5faef340abde6.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/rexogeguxosix/wazagisetuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/bodmas_decimals_worksheets.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32A 5596 bytes
SHA-256: c097d0aa7e67fd61fccb768da19a72aeacab5aa25264283a1b2e96152c1de478
font_01_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 10276 bytes
SHA-256: 7bc4c1b7b9d2ec8fcf030b502c4d55391b231edbb19c63ee8a514593d29f7b50

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