Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e1826019c37dd7…

MALICIOUS

PDF

45.5 KB Authoring application: Karbon
MD5: 0ab0a9fd81c7d729d07a192dc18faffd SHA-1: 66463a66e13ee1b2eb93d9237fa9121e099b1056 SHA-256: 79e1826019c37dd73c391d5e42eeaa9896668f0ce5c626bd7d75663d427ec180
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, while appearing to be about 'Simetria axial', contains obfuscated text and embedded URLs, suggesting a phishing or malware distribution lure.

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://starlightdjservices.com/uploads/1/3/0/5/130588382/digokagibiduti_soladepitodovi_zumezij_lozonafet.pdf
    • http://advancedinstallations.com/uploads/1/3/0/3/130323522/3516428.pdf
    • http://younionstudio.com/uploads/1/3/0/4/130483542/a1c0e4d03.pdf
    • http://proxyregister.com/uploads/1/3/0/6/130639230/5747868.pdf
    • http://remoteworktech.com/uploads/1/3/0/6/130604801/aae74114639781.pdf
    • http://miracleinabucket.com/uploads/1/3/0/5/130551095/130551095.html#simetria+axial+ejemplos+vida+cotidia
    • 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_off000011bc.bin
a7ec166d2df03c7c478caafdf282e56e193a46f5d87aef576e69e347e51641d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC 10704 bytes
font_01_sfnt_off00006ba4.bin
32bdc4d24c5e1411dff6a7cb0e11b4db57f258f5f1aebd915c07bb0c4fe5be7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 16160 bytes

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