Malicious PDF — malware analysis report

Static analysis result for SHA-256 54164388b42dabea…

MALICIOUS

PDF

32.5 KB Authoring application: pdf-parser
MD5: 2dfb49f992c104f411943d5d0a8ee877 SHA-1: 41fb3edd263cc277d056fe72f2c9b6e2964ebfbd SHA-256: 54164388b42dabeac53584b982652a2087b0e33e3956d205c2cdb07640cb2f65
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malicious payloads. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body itself is heavily obfuscated but contains numerous URLs that are likely part of the link farm. No scripts were extracted, but the PDF structure and URL distribution are indicative of a phishing or spam campaign.

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://patlyonscreations.com/uploads/1/3/0/6/130639521/wetuxa_fadikirinufel_dolubanovi.pdf
    • http://admiralrent.com/uploads/2020/01/27/eb9363eab9290c5.pdf
    • http://christinaparrella.com/uploads/1/3/0/2/130271145/fubazipakowewiputat.pdf
    • https://sonufavorunex.weebly.com/uploads/1/3/0/6/130604254/0bd6e6f3321.pdf
    • https://dediborarif.weebly.com/uploads/1/3/0/2/130270987/8810322.pdf
    • http://barryboycephotos.com/uploads/1/3/0/2/130289283/dafol-lizof.pdf
    • http://vegon.krasiva24.com/uploads/2020/01/28/pukolokamixirad_firesiralep.pdf
    • http://nadineheck.com/uploads/1/3/0/6/130621101/4ae2d.pdf
    • http://softsea.fr/uploads/1/3/0/3/130323566/4526840.pdf
    • https://vovevemetoli.weebly.com/uploads/1/3/0/4/130492441/menevikogaxuwul.pdf
    • https://kamadizami.weebly.com/uploads/1/3/0/4/130476276/dumudafub_doletebuj.pdf
    • http://jibajexow.irbispartner.ru/uploads/2020/01/28/9ceb49847e5ed.pdf
    • http://keepdivealive.com/uploads/1/3/0/5/130551625/1621693.pdf
    • http://shrinkingvioletjewellery.com/uploads/1/3/0/5/130550777/fd94c7a7977.pdf
    • http://classicalballettheatermd.org/uploads/1/3/0/5/130544138/151a65dc105.pdf
    • https://tewevoxobavew.weebly.com/uploads/1/3/0/4/130488935/xonupiralujiluku.pdf
    • http://patricia-martinez.com/uploads/1/3/0/4/130483761/b3c7cf53466455.pdf
    • http://bodyworkbybarb.com/uploads/1/3/0/6/130620367/130620367.html#caprice+24+john+williams+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000153f.bin
000b6017381d83cc4a4300c722c53414dc3ed78daa673c5ac67ae90c55e625a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153F 8364 bytes

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