Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d37d8503bd685fb…

MALICIOUS

PDF

37.2 KB Authoring application: Scribus
MD5: 5a50a786b40028a3d449847b336fccdd SHA-1: e44d3d35870528f48da50a660fa634d9e0967d0d SHA-256: 0d37d8503bd685fb6c4c7ebb9af111a8e44ef97635ba3e5fae85a7ae99571c26
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links to other PDF files, indicative of a link farm or SEO spamming technique. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body, though heavily obfuscated, appears to be related to educational content, likely a lure to disguise the malicious nature of the embedded links.

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://olykraut.net/uploads/1/3/0/6/130639854/penodebupakizef.pdf
    • http://normandyoptical.biz/uploads/1/3/0/2/130288468/ce5b3.pdf
    • http://bars4bitcoin.com/uploads/1/3/0/6/130639889/kedazitonajozoj-kuved-semeb.pdf
    • http://declanvoss.com/uploads/1/3/0/3/130324203/8826080.pdf
    • http://design.surfaceimports.com/uploads/1/3/0/7/130776315/navutevikibawa.pdf
    • http://onamishon.com/uploads/1/3/0/2/130292110/zovevaxun.pdf
    • http://nimbus-realty.com/uploads/1/3/0/5/130550955/3830780.pdf
    • http://athywaterways.com/uploads/1/3/0/5/130550704/d6e6d291000a1c4.pdf
    • http://vmiengineering.com/uploads/1/3/0/7/130776667/7003723.pdf
    • http://lauryan.org/uploads/1/3/0/7/130739021/pebevo_zofofeko_weruluwiki_jupenopom.pdf
    • http://portergames.net/uploads/1/3/0/7/130740624/353760.pdf
    • http://deannagrant.com/uploads/1/3/0/5/130539840/vuvuzorusesi.pdf
    • http://74-123-75-25.mgwnet.com/uploads/1/3/0/5/130588232/130588232.html#short+reading+passages+with+questions+for+middle+school

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000392b.bin
f13e3d795b8bc874e4584f3fbfb3336404884a644df617df0e6e0b18f9cd44f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x392B 8208 bytes

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