Malicious PDF — malware analysis report

Static analysis result for SHA-256 26199cb5fe8e791a…

MALICIOUS

PDF

70.9 KB Created: 2020-11-14 14:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9c0c02d40a1584465aa0a3a2a30ea391 SHA-1: d78edc9af5729d0ed619eafbe20597223416935b SHA-256: 26199cb5fe8e791a5d2905501c5fc77e20d2555c9307de4aa13b7a57184e222e
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-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=rudram+chamakam+by+challakere+brothe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5f9333df2be0a.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/3440429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fa17d203ae2a.pdfIn PDF document text
    • https://temoxemotedi.weebly.com/uploads/1/3/4/5/134599163/rugusilusejezag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8cbe569d00b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411501/normal_5f94db7d1890d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8785f11270d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8fed79968ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8774e475a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5faf38992299d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8d829a1114d.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/sefufizodofok.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/jifesu/85595987635.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_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 5316 bytes
SHA-256: 58c48a6c717d3cec8c4c916d46c65b43b118861a607db0401c7661bf6ed575d1
font_01_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 10216 bytes
SHA-256: 434803d3be324b6a78aa01061dce02f9ab051ca88970a18518b15470ae071086

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