Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e737b812bb44630…

MALICIOUS

PDF

46.3 KB Authoring application: Adobe PDF Library 9.0
MD5: a1d60c9b111762b02e89e2874c4ea7ca SHA-1: ea2f6771806584a9cb78a28d3535a6e55f489645 SHA-256: 0e737b812bb44630cd4e4077b7a49c496491ddad323696f24d4f6483cc9d1acf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence further support a malicious classification. The embedded document body text appears to be corrupted or obfuscated, but the presence of URLs and the heuristic firings strongly indicate a phishing or malware distribution attempt.

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://pendulumhealing.com/uploads/1/3/0/3/130323693/gafovemenitori.pdf
    • http://pisesale.gk-absolutstroy.ru/uploads/2020/01/28/4209088.pdf
    • http://amityschuyler.com/uploads/1/3/0/5/130542964/bbbc4dc8e35b7.pdf
    • http://bovelol.lebatik.ru/uploads/2020/01/28/4063308.pdf
    • http://annotalegal.com/uploads/1/3/0/6/130621447/komamazura.pdf
    • http://soccerlegion.com/uploads/1/3/0/6/130603988/sunedopaxosi-ranemenafe-kifonotuvepunev-winemomixul.pdf
    • http://courtneysteed.com/uploads/1/3/0/3/130323163/rusafejus-volepowosa.pdf
    • http://nashvillerollingpincompany.com/uploads/1/3/0/6/130604091/tasesesube_wonuzeja_muduj.pdf
    • http://unnecessaryheelhooks.com/uploads/1/3/0/6/130621457/nikanutadav.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/2/130272591/130272591.html#excelde+aritmetik+ortalama+form%C3%BCl%C3%BC
    • 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_off00001486.bin
5e32e7f459b0e0ad5d09732a7363d71a61170314335dba67803752f90704c92c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1486 9992 bytes
font_01_sfnt_off00006e6b.bin
9e52cf0b4c9b4a11ec320a428a0aebd36693c99a22519d050d3fa56eeb8f8f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 16200 bytes

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