Malicious PDF — malware analysis report

Static analysis result for SHA-256 29048cfe196b46e5…

MALICIOUS

PDF

41.9 KB Authoring application: Smallpdf Desktop
MD5: f47063be1df1d30f1b2bbe4435371d1f SHA-1: 93b34b7ed1919d17f775f0b7a4a02fcb5014c1f6 SHA-256: 29048cfe196b46e5f0a1c15b24eaa841ce2e4b4bee40fca6ff36206bec1e2e11
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though heavily corrupted, contains references to 'Balancing equations practice worksheet answer key science spot' and several URLs, reinforcing the lure and redirection strategy.

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://jajivimez.zichain.pro/uploads/2020/01/28/2722467.pdf
    • http://100firesmoto.com/uploads/1/3/0/6/130604675/0d4f46d7e262f.pdf
    • http://clutteredgypsie.com/uploads/1/3/0/3/130379821/xepil_makuzawidikusop_kekitojaj.pdf
    • http://capoeirabayonne.com/uploads/1/3/0/5/130588343/0aa278687.pdf
    • http://kpugaming.com/uploads/1/3/0/5/130540159/nizasefu-monazuwivufos-xasaxumito-gipevo.pdf
    • https://vimuzizop.weebly.com/uploads/1/3/0/2/130272438/gutode-rurexes.pdf
    • http://barosario.org/uploads/1/3/0/6/130639240/ximulujebekem.pdf
    • http://bayareabackdoc.com/uploads/1/3/0/4/130488153/lelozofo.pdf
    • http://uwhqsc.org/uploads/1/3/0/5/130590217/8851126.pdf
    • http://rehphotography.org/uploads/1/3/0/6/130620435/130620435.html#balancing+equations+practice+worksheet+answer+key+science+spot

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000126f.bin
b7dae9a263eab5a364b9da28af6dbb3446a6e1309ee6e92a049560a5b63b4ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126F 8400 bytes

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