Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1f3581403c0529…

MALICIOUS

PDF

40.9 KB Authoring application: ImageMagick
MD5: e715af01ec482322db806e3a7c7eb7e8 SHA-1: 88d0bffb8ee507c7fab51277e91829efc5605405 SHA-256: ea1f3581403c0529a787925076a430948358ff410eb0870e2ba85ca8500f42d4
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

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://musicroomresources.com/uploads/1/3/0/5/130542780/febin-jirovidalil.pdf
    • http://yogalabbet.se/uploads/1/3/0/4/130475994/xebixusirekajigo.pdf
    • http://www.westcountryglamping.com/uploads/1/3/0/4/130475994/vokuxoliw-disavejoluxaj-zesovifozapo.pdf
    • http://zuludj.com/uploads/1/3/0/6/130604340/lareg_buroposugavafo.pdf
    • http://bluffcreekfarmsbedandbreakfast.com/uploads/1/3/0/4/130483939/zewutemitun.pdf
    • http://www.tiengdanchoem.com/uploads/1/3/0/6/130604635/e451683.pdf
    • http://garethjmartin.net/uploads/1/3/0/2/130289359/c0f3b6.pdf
    • http://tfamcon.com/uploads/1/3/0/5/130588294/7622355.pdf
    • http://evarp.com/uploads/1/3/0/7/130740590/4bacfb7e4.pdf
    • http://majordrillling.com/uploads/1/3/0/5/130589354/4696517.pdf
    • http://newlifeknox.com/uploads/1/3/0/7/130739747/bebutetetuvud.pdf
    • http://xn--c1aanafncj4aa9da2gcbc.xn--l1acc/uploads/1/3/0/4/130483354/xuzavagakusiz-nugekigotun-zamapulatet-fubepefawafi.pdf
    • http://agilemy.life/uploads/1/3/0/7/130775441/xofodezapusatiteg.pdf
    • http://tmsmllc.com/uploads/1/3/0/6/130604599/volozaw.pdf
    • http://9l6v0m.bdgct.com/uploads/1/3/0/5/130539305/130539305.html#cover+letter+sample+for+junior+accountant

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dbc.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBC 16036 bytes
font_01_sfnt_off000044ec.bin
b6f6b71ff240461d26b3fd2688ed5c7c37b96a6d313f12b6030546eeca12b3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44EC 8328 bytes

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