Malicious PDF — malware analysis report

Static analysis result for SHA-256 c047ac5cc98d29a5…

MALICIOUS

PDF

34.2 KB Authoring application: OpenOffice.org
MD5: 0fc761ac9e5562c686eb61415ab1d1ee SHA-1: 1333e2f95d13a8463e20ae54247586695b493c43 SHA-256: c047ac5cc98d29a582dabe8df0ef4fb357c71f27712e8e117e18e9814df1b440
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which are disguised as 'grammar book answer key' links. This heuristic firing, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or redirection campaign. The embedded URLs are the primary indicators of compromise, leading to a network of potentially malicious sites.

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://mypromobook.com/uploads/1/3/0/2/130272909/ff0a549.pdf
    • http://photosandburritos.com/uploads/1/3/0/6/130621077/fofixit.pdf
    • http://cockblockproductions.com/uploads/1/3/0/2/130288410/7187444.pdf
    • http://laryssachan.com/uploads/1/3/0/3/130323251/matunapawazatajudux.pdf
    • http://myteamnavigate.com/uploads/1/3/0/2/130270808/41cc0.pdf
    • http://dp360crrn.com/uploads/1/3/0/6/130604799/96839122.pdf
    • http://cleaningclinic.shop/uploads/1/3/0/7/130776541/vowino_vunutalutipoje.pdf
    • http://missdayteaches.com/uploads/1/3/0/5/130588674/63502bd.pdf
    • http://akasharae.com/uploads/1/3/0/4/130476039/dotazaj.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/6/130639563/130639563.html#enterprise+3+grammar+book+answer+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011d9.bin
29888cdd34f9925c5bea713ec92759120e3523b72b96719fadcb9f5382cbd21a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9 8580 bytes

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