Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c26b2b5bffd46f…

MALICIOUS

PDF

36.2 KB Authoring application: LibreOffice
MD5: c71254adc456014c99c1ebb37bcfe57a SHA-1: c1e7b77c55f849a70360a3427775ce4e258cadd0 SHA-256: 37c26b2b5bffd46f0d54f230ebc35ff23f8d98f39e961c199faf02e0f9f3e3dc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to educational worksheets, likely a lure.

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://cesartechnologiesltd.com/uploads/1/3/0/6/130604767/sowowipal.pdf
    • http://www.thinkleetutoring.com/uploads/1/3/0/5/130545333/2468333.pdf
    • http://affinityforever.com/uploads/1/3/0/2/130289282/tofate_tuxarebom.pdf
    • http://www.rmwcaf.org/uploads/1/3/0/3/130313729/6586041.pdf
    • http://nhsilbert.net/uploads/1/3/0/6/130639924/zofik-zopugudesiz-tudukixep-witepepitemozaj.pdf
    • http://isclinical.net/uploads/1/3/0/6/130621785/digila.pdf
    • http://sewbusy.net/uploads/1/3/0/4/130489914/65165.pdf
    • http://rentdash.com/uploads/1/3/0/7/130775292/7871713.pdf
    • http://endeavorsystems.com/uploads/1/3/0/6/130640119/guvabajejiril.pdf
    • http://www.angela-devine.com/uploads/1/3/0/6/130639510/39bc98315b4.pdf
    • http://preschoolhouse.com/uploads/1/3/0/6/130604203/furunutokajebave.pdf
    • http://tagmasters.us/uploads/1/3/0/6/130604948/083b5796c4dd.pdf
    • http://marlinjames.org/uploads/1/3/0/8/130874617/ef6b25b7ff5835.pdf
    • http://g1iw4o.bdgct.com/uploads/1/3/0/6/130605112/130605112.html#area+and+perimeter+of+irregular+polygons+worksheets
    • http://rentdash.com/uploads/1/3/0/7/130775292/78717

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003517.bin
e4bdeccbf98a3c333ae71ebce42042d67e92dfeb2b51b62bcb38981b22988947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3517 7784 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.