Malicious PDF — malware analysis report

Static analysis result for SHA-256 8900806f16257e48…

MALICIOUS

PDF

42.2 KB Authoring application: LibreOffice
MD5: 86fa1909e3e15e63d02a5b73ad9588da SHA-1: 977c8b3c409274fdd8ccec6640afa66946a8edbf SHA-256: 8900806f16257e48886d83ed8933c94a9c58ed0ffaab1f642060d93ab0ec91ea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the sheer volume of linked PDFs suggests a coordinated effort to redirect users.

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://selectrole.com/uploads/1/3/0/6/130639805/85ac31eda7.pdf
    • http://alaqabala.com/uploads/1/3/0/3/130379611/386423.pdf
    • http://www.meganhollstedt.com/uploads/1/3/0/2/130272504/1104204.pdf
    • http://ticketmenow.us/uploads/1/3/0/4/130477090/xisekiwenev_rizuvisop.pdf
    • http://www.aaroncharlesg.com/uploads/1/3/0/8/130874043/xotezipalo-velogafek.pdf
    • http://projectchicagorealestate.com/uploads/1/3/0/2/130272512/lorek.pdf
    • http://formormedia.com/uploads/1/3/0/6/130604083/e94a90ecfa429.pdf
    • http://statsclothing.com/uploads/1/3/0/2/130289540/wivexijudamoze.pdf
    • http://nwm6.club/uploads/1/3/0/6/130620296/1543183.pdf
    • http://domterapii.com/uploads/1/3/0/4/130436299/5399b7a9.pdf
    • http://www.smockpaperscissorsbellingham.com/uploads/1/3/0/2/130271096/4858390.pdf
    • http://endkunden.os-kg.de/uploads/1/3/0/8/130874284/xulalel_lawelu_jumazabukeguge.pdf
    • http://saverioesara.com/uploads/1/3/0/7/130776336/36e64b4d.pdf
    • http://phroztnet.net/uploads/1/3/0/2/130288932/pasirutozidasijuno.pdf
    • http://www.ccbubblesboutique.com/uploads/1/3/0/6/130639882/numifodufevej.pdf
    • http://austinaction.com/uploads/1/3/0/5/130538990/wagenabo.pdf
    • http://blackfishmanresa.com/uploads/1/3/0/3/130323156/83661f3.pdf
    • http://actscommunitychurches.com/uploads/1/3/0/2/130289541/2973814.pdf
    • http://twistedsugarut.com/uploads/1/3/0/5/130588437/130588437.html#hipoplasia+renal+unilateral+tratamiento
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d30.bin
fc0bcc9d08d908b8b1287d0ab2df4e3a5be78b1d1690d8efe3ff9d2c54ab5679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D30 16064 bytes
font_01_sfnt_off000044ca.bin
26d8b015a256d15858c3aea1748a355d7a8d48d89c5a3f3d150be3a839e68c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44CA 9332 bytes

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