Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d9ce3411c0a953…

MALICIOUS

PDF

46.7 KB Authoring application: pstoedit
MD5: 1f2bb1bb6dab3021d1290a4b17d1d8d0 SHA-1: a4349be816b152bafb51592f57e14cca99c4960d SHA-256: 82d9ce3411c0a9533ace16ce6ceb5aa2621171f9d9359e1fecb43dfeb666716a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. This behavior is indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted from this sample.

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://oyekanlaws.com/uploads/1/3/0/6/130621480/fesolopufiw_tumikabadebux_kixawukalopope_jiwixiravixoniz.pdf
    • http://gexi.samguru26.ru/uploads/2020/01/28/6557400.pdf
    • http://projectgrowca.com/uploads/1/3/0/2/130274338/wimikenalivaxigovutu.pdf
    • http://mindsetmakeover.site/uploads/1/3/0/5/130538869/370285.pdf
    • http://myerstownboyscouts.com/uploads/1/3/0/6/130621219/914b2e350fb.pdf
    • http://michaudsblog.com/uploads/1/3/0/4/130488299/b6d26.pdf
    • http://peterstownshipgolf.org/uploads/1/3/0/3/130323884/wiwovupirodese_wavudoz.pdf
    • http://myopros.tech/uploads/2020/01/28/towilisisefogajede.pdf
    • http://northern-carbon.com/uploads/1/3/0/5/130539229/130539229.html#stages+of+language+acquisition+chart

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fb.bin
8ce28632e2aad88c1d317433f08593433ef0b0b54bac3b61a0e350acc42a502c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB 8088 bytes

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