Malicious PDF — malware analysis report

Static analysis result for SHA-256 183e825776634fe6…

MALICIOUS

PDF

53.1 KB Authoring application: PDF Studio
MD5: b9ca52cf0437b654fb5fbf0ef3170715 SHA-1: 03e7e7b4d4c79a87e4067188644e81a99a3fe5eb SHA-256: 183e825776634fe68b71b6da5798fca14fcf9e30c5252e1fa75fa9a6f2f7750e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rofl-case.ru/uploads/2020/01/28/jozutidovu_lugosarugijuso.pdf
    • http://montealegrefarm.com/uploads/1/3/0/6/130603995/vivigisovaxorupir.pdf
    • http://nelsononline.net/uploads/1/3/0/5/130588294/f370637a799.pdf
    • http://drpatty.net/uploads/1/3/0/5/130545334/7183176.pdf
    • http://fundamentsovet.ru/uploads/2020/01/28/najaduwi.pdf
    • http://9f60dnj005.com/uploads/1/3/0/6/130620828/jetaleni_zudotatikawelen.pdf
    • http://vintagefairedecor.com/uploads/1/3/0/6/130605353/23b390f3.pdf
    • http://drbarrnd.com/uploads/1/3/0/5/130588162/1459462.pdf
    • https://ginosakokonizu.weebly.com/uploads/1/3/0/4/130483407/711e6f446e.pdf
    • http://littleoasis.co.nz/uploads/1/3/0/4/130435688/gaveru.pdf
    • http://rockin-g-resources.com/uploads/1/3/0/5/130551880/tidujuf.pdf
    • http://cmjlawn.com/uploads/1/3/0/7/130738950/130738950.html#aniruddha+bapu+wiki
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001407.bin
e7e1533d217b8c8cd583510baccce3baf1152720140361c4292c1b598ff5ff85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1407 8612 bytes
font_01_sfnt_off00008a35.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 16036 bytes

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