Malicious PDF — malware analysis report

Static analysis result for SHA-256 6409abf436388b2f…

MALICIOUS

PDF

39.0 KB Authoring application: PDFBox
MD5: 92c6623ec28f20d5e3a0e01bb99a188a SHA-1: 878735f2e86e1b63c259669bfe51a57f80b2fa21 SHA-256: 6409abf436388b2ffae1ad79a8eada461b36bc1c3eb3e254abc0ed80c6373729
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a coordinated effort to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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://npaevents.com/uploads/1/3/0/6/130620736/4658370.pdf
    • http://www.bobaseball.com/uploads/1/3/0/7/130775672/robufewozotin_namopuwel.pdf
    • http://9belowmke.com/uploads/1/3/0/6/130604620/pezejen-sipoz-xogeret-ropafigozuxovoz.pdf
    • http://rentalspacificgrove.com/uploads/1/3/0/5/130539416/kupabivigefomog-fapatakusegik-kopozaguj.pdf
    • http://mysyracuse.com/uploads/1/3/0/2/130288639/b99d6a9ef.pdf
    • http://dgias.pl/uploads/1/3/0/5/130550976/zunitetikasenu.pdf
    • http://krdesigns21.com/uploads/1/3/0/5/130551765/zenapok.pdf
    • http://my911alerts.com/uploads/1/3/0/7/130739290/9d4fe031.pdf
    • http://rideandtrain.com/uploads/1/3/0/5/130588426/1cb6f.pdf
    • http://sblimexprnce.com/uploads/1/3/0/5/130588489/lulurujivugo.pdf
    • http://mustplays.com/uploads/1/3/0/6/130622047/0b05a9.pdf
    • http://8r334.bpmtc.com/uploads/1/3/0/9/130969839/130969839.html#similarities+and+differences+between+diabetes+mellitus+and+insipidus

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004345.bin
07a003c514f12c99db961f9a1db719cd3d582d841a71b3e2968418d99082b4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4345 7396 bytes

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