Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13f18449d5d7a67…

MALICIOUS

PDF

39.5 KB Authoring application: Smallpdf Desktop
MD5: 1c0e3f695180d5f805768e7d84198914 SHA-1: 045014af8883ab23e8adad33a9afdf9651b28e95 SHA-256: d13f18449d5d7a67202b2856d892d3dd9d60b95fdb7d68120920e16394da86ac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing or a downloader. No scripts were extracted, but the extensive link farm is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://crafteroffun.com/uploads/1/3/0/6/130639792/e5a3dfcb38.pdf
    • http://empireofthedead.net/uploads/1/3/0/5/130544078/jotovepib_fulanisi.pdf
    • http://mexo.khvalov.info/uploads/2020/01/28/2338742.pdf
    • http://chainznthingz.com/uploads/1/3/0/4/130493893/ff1c15d2420.pdf
    • https://vorijedive.weebly.com/uploads/1/3/0/5/130547999/fuxinira_zenezedogikejij.pdf
    • https://fujoramewozige.weebly.com/uploads/1/3/0/5/130551585/678390.pdf
    • http://taocostarica.com/uploads/1/3/0/4/130483480/34a677.pdf
    • http://mybabyluvz.com/uploads/1/3/0/5/130539992/d0ff77.pdf
    • http://ackertech.org/uploads/1/3/0/6/130621051/xomowi.pdf
    • http://eandmclub.com/uploads/1/3/0/5/130551651/0a83008f17e4a7.pdf
    • http://howepropertymanagement.net/uploads/1/3/0/6/130604401/refojetutenonububu.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/6/130640116/130640116.html#gta+san+andreas+cheats+skip+mission+ps2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d8.bin
d45f1993e3a38521b5215022f95dbe69681a0f3332fa7b1181c4e2b65e844595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8 8588 bytes

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