Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48b31b01faeae05…

MALICIOUS

PDF

42.8 KB Authoring application: pstoedit
MD5: cb715650028147ac529bd4b2ae3aa781 SHA-1: 1c4ea390fd27b7bacf085c30e2faad56400064f5 SHA-256: d48b31b01faeae0573bf263b17f5ec35a8d45e076c8782df22f306556bef8c9e
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a mass of external links. The ML classifier and ClamAV also identified it as malicious. The document body contains numerous URLs, many of which are likely part of a link farm designed to distribute malware or conduct phishing attacks.

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://walkaboutfarmfurniture.com/uploads/1/3/0/6/130620525/nuxagekulitube.pdf
    • http://mylifeinconchas.com/uploads/1/3/0/4/130488993/e5ffd3892.pdf
    • http://9f60dnj005.com/uploads/1/3/0/6/130604521/5437419.pdf
    • http://gamehighlights.fun/uploads/2020/01/29/lomagaridere.pdf
    • http://boneyardbeanies.com/uploads/1/3/0/4/130477193/wenaguziduvu-luwerewi.pdf
    • https://xelaxojepaso.weebly.com/uploads/1/3/0/5/130550838/naremujim_kapupasamoludu.pdf
    • http://atlantadrummethod.com/uploads/1/3/0/2/130270974/molirasa.pdf
    • http://agld.weebly.com/uploads/1/3/0/5/130589249/9154978.pdf
    • http://andrewtdemeo.com/uploads/1/3/0/5/130588657/130588657.html#beyerdynamic+mmx+300+manual

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001241.bin
e01e2d19517527e48d349355f72c77de21ffab2b0cdb0b2b3bb92b9dc533216c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1241 10312 bytes
font_01_sfnt_off00006bd2.bin
cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD2 2828 bytes

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