Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b532c64d491068…

MALICIOUS

PDF

70.7 KB Created: 2020-11-28 09:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa2a46733d5c4bfb2a8bd8def82c71fc SHA-1: 1a742532bab034e34dabee2cba8ee0f51cfa9246 SHA-256: f5b532c64d4910688fe15e8757319d31c4c8f59f9551cf0f93c446354de6ed8d
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 0.9995

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://trafftec.ru/strik?utm_term=pokemon+masters+guide+chapter+18 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8dcc9c5ab67.pdfIn PDF document text
    • https://feresaxeto.weebly.com/uploads/1/3/4/6/134609658/jevozozav.pdfIn PDF document text
    • https://poxuxeket.weebly.com/uploads/1/3/3/9/133997588/2d38a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_5fbc6b08763c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f871e67e5745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_5fad576225d8d.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
    • https://s3.amazonaws.com/jimugivos/facebook_messenger_app_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/54297235520.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/manual_for_bosch_silence_plus_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cec213f-2aee-45ed-a52f-c3bc4478c377/peramuvojumemom.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 7

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_off0000ca4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4C 5648 bytes
SHA-256: 12ed475b9369ff9777299e377a73cc1926785eee76fc8bcf04ab33aabd531e10
font_01_sfnt_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 10168 bytes
SHA-256: 1f417efb69616ea5f54cd8ac93a9c030fbfbb5bd6d745515bbaf2371033aba2a
font_02_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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