Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12b1a919d403a32…

MALICIOUS

PDF

43.8 KB Authoring application: GIMP
MD5: c924670e4c25a880575e0f179b02eeaa SHA-1: a98b1910b7560dc7968378956cfe1c0e74fa9c83 SHA-256: e12b1a919d403a328fae28373b00d435f0943f178f3094868d24b1425a01783a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, a technique commonly used for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a malicious intent to redirect users to potentially harmful content. The embedded URLs are the primary indicators of compromise, likely serving as landing pages for further malicious activity.

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://linunip.studio-elephant.ru/uploads/2020/01/29/775d4b0715324.pdf
    • http://sellyourownhome.net/uploads/1/3/0/4/130483163/nabeweguj.pdf
    • http://loweslake.com/uploads/1/3/0/3/130313368/pitaf.pdf
    • http://bulujenuxu.gris1.com/uploads/2020/01/27/xuzezodal.pdf
    • http://rssailing.org.au/uploads/1/3/0/4/130488470/felumi.pdf
    • http://karkakclab.com/uploads/2020/01/27/62fd3.pdf
    • http://happyhippeelife.com/uploads/1/3/0/3/130313194/wipusiv.pdf
    • http://marmiger.com/uploads/1/3/0/4/130475925/53a66d04ca72a.pdf
    • http://mjrich.net/uploads/1/3/0/5/130541064/fimuleberovaxadus.pdf
    • http://monkeesconcerts.com/uploads/1/3/0/5/130588865/4509561.pdf
    • http://astrologyandcrystallighttherapy.com/uploads/1/3/0/5/130551859/130551859.html#fishing+guide+stardew+valley+bundle

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121e.bin
eba0e24cdece6ac7c977ac7621a417df260cf9a9dccdf35c40b51a779fa99faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121E 8072 bytes
font_01_sfnt_off00006436.bin
22cd034339abe83ef100088c344c397d43dbcb1a696a587bbc5f11ca204a751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 16204 bytes

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