Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80ac11d27d85674…

MALICIOUS

PDF

40.3 KB Authoring application: Serif PagePlus
MD5: be0c87f7aa65405e1398cfa670017584 SHA-1: f45e28fb1b81183333da59f5bbafbf51c8547406 SHA-256: e80ac11d27d8567450e8000e60f40e17fe289b97b3141a7a0f51cd54dab9d0c4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself is largely unreadable, but the presence of the URLs and the heuristic firings are sufficient to assess the attack pattern.

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://nariknektalov.com/uploads/1/3/0/6/130639311/506898.pdf
    • http://youngatheartdesigns.com/uploads/1/3/0/5/130539131/joxal.pdf
    • http://semulig.7x4.ru/uploads/2020/01/28/8820966.pdf
    • http://hazluxvip.com/uploads/1/3/0/5/130543787/53ca1bf.pdf
    • http://mortariopharma.club/uploads/1/3/0/5/130546244/01892.pdf
    • http://xanadu.gallery/uploads/1/3/0/5/130539597/179413.pdf
    • https://xagaguruxuton.weebly.com/uploads/1/3/0/2/130289441/d4cd80.pdf
    • http://lectricwind.com/uploads/1/3/0/5/130589094/xivokorubimapo-ledobiva.pdf
    • http://dovi.baccy-earwing.info/uploads/2020/01/29/601496.pdf
    • http://ashtaashram.com/uploads/1/3/0/6/130621373/9228043.pdf
    • http://datasave-app.com/uploads/1/3/0/4/130483155/130483155.html#calculate+ph+of+buffer+solution+given+ka

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001219.bin
9bbb48c825d31dc272296fec1710842d6d0a3fc43b0ba8019e3299645aa51544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1219 7892 bytes

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