Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e878e3648fb609…

MALICIOUS

PDF

42.4 KB Authoring application: LibreOffice
MD5: cec2efb50c2c89980a06320235b23b10 SHA-1: 7ef4203b98e205648544d67b57e6c67ae646c954 SHA-256: c3e878e3648fb60969836578999500adce727d82983d2f8c80097891f133083c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample, but the sheer volume of linked PDFs suggests a coordinated effort to drive traffic to potentially compromised or malicious sites.

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://rpprojects.be/uploads/1/3/0/3/130324063/sumoruj.pdf
    • http://www.harrisonsmith.co/uploads/1/3/0/7/130740330/ruvenolefa.pdf
    • http://johngeneralconstruction.com/uploads/1/3/0/4/130476878/3153520.pdf
    • http://declareyourday.com/uploads/1/3/0/2/130272932/ea8c33a.pdf
    • http://ryan-foster.com/uploads/1/3/0/5/130540937/3432262.pdf
    • http://edtechieteacher.com/uploads/1/3/0/2/130288642/cb88c.pdf
    • http://myremtec.com/uploads/1/3/0/5/130538956/mejowag.pdf
    • http://webmail.luxor-bg.com/uploads/1/3/0/6/130604765/d67f36a64ae6c.pdf
    • http://www.improveyourvoice.net/uploads/1/3/0/3/130323342/lupirazowokilafobam.pdf
    • http://bestquotesdaily.com/uploads/1/3/0/4/130483623/6804802.pdf
    • http://www.nathaniel-e-yamamoto.com/uploads/1/3/0/6/130604232/cac6a136230d3d.pdf
    • http://menschwork.com/uploads/1/3/0/6/130604715/dixevo.pdf
    • http://aguayoperformance.com/uploads/1/3/0/5/130543368/loruseregatexe-zovamazu.pdf
    • http://proarbtreeservices.com.au/uploads/1/3/0/7/130739524/nekarekewi-jumagirazoja.pdf
    • http://webdisk.vua.no/uploads/1/3/0/8/130874240/5414841.pdf
    • http://casey-family.rominastiebenphotography.com/uploads/1/3/0/9/130969960/130969960.html#esl+past+tenses+worksheet

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003252.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3252 16204 bytes
font_01_sfnt_off00004a26.bin
99d6c0aa33e02b907b854af60cd6e60a7eeb19bf1d36302382c7a2500e8641fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A26 8160 bytes

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