Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f59caa97abf38f2…

MALICIOUS

PDF

73.8 KB Created: 2020-11-09 18:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bef5021d526f3cc53fccd69e355b0d84 SHA-1: df6816780fac08ebe83ca92997ae04720c360042 SHA-256: 0f59caa97abf38f2b570395302910fd3b733b392c5cde819e5c83eae3bbe5142
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 0.9997

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://traffking.ru/123?keyword=mario+run+unblocked+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f89e0bc74e2e.pdfIn PDF document text
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/6159067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fa385c55f25e.pdfIn PDF document text
    • https://wonefosobafig.weebly.com/uploads/1/3/4/4/134479447/94c8d8860c0.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/gapokaduxada-pubiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_5f90ad7d43cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f9dfe3d87db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f93932c2476b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5f91854a6c77f.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/nunotofowapudu-liboze.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/db0929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 5272 bytes
SHA-256: f020b7a381b0bebb6a6445eeb80ff15eca23df5b9023e4572e196761186e979f
font_01_sfnt_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 10364 bytes
SHA-256: bb7925c73382a6cfd3db91d234df002dc26b475d97c1749218e51af832254dbf
font_02_sfnt_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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