Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ac9a01a0ad667…

MALICIOUS

PDF

42.0 KB Authoring application: Karbon
MD5: fa5d63b6fee01d14d7cb74eb8e59a746 SHA-1: bde8690c754dab0ff06c1e78e04da77406aa86e1 SHA-256: 626ac9a01a0ad6679eefc0be6d971b9a0c7e233d26bc5ee2403c76cea099d98f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to redirect users to 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 https://juwilepupipif.weebly.com/uploads/1/3/0/2/130289291/a461672.pdf
    • http://psykhepress.com/uploads/1/3/0/7/130739221/ponipiwobepetuleza.pdf
    • http://narayanaresidences.com/uploads/1/3/0/5/130590538/70b65b307398.pdf
    • http://sundeenpc30.weebly.com/uploads/1/3/0/2/130273814/5bfa1e839.pdf
    • http://nuskin-success.com/uploads/1/3/0/6/130639889/b7eb06fc0d9267.pdf
    • http://delightyourspirit.com/uploads/1/3/0/4/130492963/1122440.pdf
    • http://fitnesspriority251.weebly.com/uploads/1/3/0/5/130551890/vezegujalekore.pdf
    • https://jefejusofad.weebly.com/uploads/1/3/0/4/130483320/6871fd449ed3.pdf
    • http://agentrh.com/uploads/1/3/0/5/130538817/xurubupox.pdf
    • http://abgymcr.com/uploads/1/3/0/2/130289515/6470219.pdf
    • http://derig.host/uploads/1/3/0/6/130620893/2da56ae05.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/7/130776590/130776590.html#rectification+of+errors+questions+with+answers+mcq
    • 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_off000012cb.bin
bd19a41965ac62116aa50af6ddf5b5c95e4ac0adb026064801dcef4485f5d9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB 8712 bytes
font_01_sfnt_off00005c58.bin
ba54437760bfee8a954391c49435f26180b257da45d28f5e3c1d270b3faa74dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C58 16296 bytes

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