Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f21ba99e9c717ec…

MALICIOUS

PDF

36.8 KB Authoring application: PDFBox
MD5: 2313a5eb26b9763b5161ef26433e4f3d SHA-1: 47e58846a109a25e061b32b22a521069e5111b40 SHA-256: 3f21ba99e9c717ece7d415199e3a5f8f7d25fe82d03dacfa54ca32e4f6bf5c46
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical finding for a link farm and a ClamAV detection for phishing. The embedded URLs, primarily pointing to PDF files on various domains, suggest a tactic to lure users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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://positiveenergyny.com/uploads/1/3/0/5/130588282/3776321.pdf
    • http://christchurchportland.org/uploads/1/3/0/4/130476688/resazonewofa.pdf
    • http://bookslearning842.weebly.com/uploads/1/3/0/6/130621727/1e21e66.pdf
    • http://xaw.nataliaoreiro.club/uploads/2020/01/29/262fba.pdf
    • http://shine2bright.com/uploads/1/3/0/3/130313159/virevuxanapinu.pdf
    • https://maxelokitemaf.weebly.com/uploads/1/3/0/3/130323384/bofedafa-fipipametamet.pdf
    • http://inglishmiqlana.com/uploads/1/3/0/2/130289475/435478.pdf
    • http://msatpartners.com/uploads/1/3/0/2/130272101/mesilimofi.pdf
    • http://matsuwholesale.com/uploads/1/3/0/5/130588559/siregejel_kanubepa.pdf
    • http://northwesternbreastsurgeons.com/uploads/1/3/0/5/130588213/boxow-gilabag-jutanutasurog-simipujanew.pdf
    • http://kazna4eyka.com/uploads/2020/01/29/7990127.pdf
    • http://mightygoodentertainment.com/uploads/1/3/0/6/130621036/01fb4a3f799.pdf
    • http://redbarhalifax.com/uploads/1/3/0/4/130494801/dunolo.pdf
    • http://absystemsllcscam.com/uploads/1/3/0/3/130379132/f505c710.pdf
    • http://jewok.compt-nickel.com/uploads/2020/01/27/funonifitida.pdf
    • http://xegaz.2206bumps04.fun/uploads/2020/01/29/1922721.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130621477/130621477.html#weathering+erosion+and+deposition+answer+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000144e.bin
ce301278b448c97bce841c7e74aea5e31971c12231468b27164cef5de4cef396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144E 7836 bytes

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