Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22b52fe58d72874…

MALICIOUS

PDF

35.3 KB Authoring application: PDFedit
MD5: 13e468a2b1738755893085a256b6fe72 SHA-1: 56841bd88e58fc6195e365af8d837772512996c6 SHA-256: a22b52fe58d7287460afb6b44fc409e1e05d7b2ccecea11a036a38a8609c1dc3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies the mass linking behavior, with the primary domain being anthemtechsupport.com.

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://anthemtechsupport.com/uploads/1/3/0/8/130873923/8753720.pdf
    • http://newyearswim.co.uk/uploads/1/3/0/5/130589227/a5862a95544.pdf
    • http://riderwilliams.com/uploads/1/3/0/7/130739059/601352.pdf
    • http://theevenbetterlife.com/uploads/1/3/0/4/130435929/ba75b7d9af63f.pdf
    • http://shivalingumdialogues.com/uploads/1/3/0/8/130813652/ledisonejezusugiwubi.pdf
    • http://myfujingarts.com/uploads/1/3/0/7/130776314/zorabizideforid.pdf
    • http://mail.analyticalsci.com/uploads/1/3/0/7/130739930/wisisukola-dafumuwimepujud.pdf
    • http://carollemonrealtors.com/uploads/1/3/0/5/130551526/vopewonipak.pdf
    • http://merrec.space/uploads/1/3/0/2/130271087/7562715.pdf
    • http://nicholasleiby.com/uploads/1/3/0/3/130323401/6143892.pdf
    • http://www.shakenstronger.com/uploads/1/3/0/5/130551331/bb88e07c4.pdf
    • http://www.robertwharris.com/uploads/1/3/0/3/130313428/863a4d72.pdf
    • http://frederickmartialarts.com/uploads/1/3/0/7/130739132/tasogamabad_turikimuge_movopebum_xaratofavepi.pdf
    • http://kbbnola.com/uploads/1/3/0/6/130621880/9174595.pdf
    • http://allbacksosteo.com/uploads/1/3/0/7/130740480/popisemo.pdf
    • http://thelanguageofmoney.org/uploads/1/3/0/2/130287813/gewitova-tuzixir.pdf
    • http://ntwstudioart.com/uploads/1/3/0/6/130604522/1997204.pdf
    • http://hostmaster.growglobalgroup.com/uploads/1/3/1/0/131071021/131071021.html#practical+descriptive+geometry+pdf
    • http://www.robertwharris.com/uploads

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec2.bin
296851a2a96fcb2d9d8f28c491f32df401c578c612b932051f4def0d6bf5ee17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC2 7308 bytes

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