Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b284433db4b032…

MALICIOUS

PDF

46.6 KB Authoring application: Mobipocket Creator
MD5: 24bf9d683e7825be603c58364fa32d27 SHA-1: 080a640daf967c7ab8c40b613e08f0bc9de1b079 SHA-256: 14b284433db4b0329d634ad1dc11633e7a0684717a76f360598d0b4a0e679e3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://andrewwarnerdogtraining.com/uploads/1/3/0/4/130483147/mozubewanu.pdf
    • http://depthstiny.com/uploads/1/3/0/6/130620478/621918.pdf
    • http://kwbtu.es/uploads/1/3/0/5/130543065/rokeva.pdf
    • http://lovehealthservice.net/uploads/1/3/0/4/130436141/8b5cc534e733f7c.pdf
    • http://missuniversevietnam2019.com/uploads/1/3/0/6/130621264/xotuzidato.pdf
    • http://al-cooley.com/uploads/1/3/0/5/130551011/3657376.pdf
    • http://asiahumanitarianaid.org/uploads/1/3/0/6/130604904/runopifasoso.pdf
    • http://mshvita.com/uploads/1/3/0/5/130546153/9469674.pdf
    • http://reinasporunacausa.com/uploads/1/3/0/3/130379227/4176611.pdf
    • http://northernsound.com/uploads/1/3/0/5/130550980/wadazaforew.pdf
    • http://gomriz.com/uploads/1/3/0/4/130493893/130493893.html#baal+veer+ka+video+full+hd
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001390.bin
230d290b529649b5b52fe35eb35360347810b5472535bff0ba78f51bb107689a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1390 8168 bytes
font_01_sfnt_off00007204.bin
0f9a27ecbf2b0d266e2c015b00cc4f9c12325aa071e3af793fef3c406b19a371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7204 7300 bytes

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