Malicious PDF — malware analysis report

Static analysis result for SHA-256 67426eb3d7356a84…

MALICIOUS

PDF

36.3 KB Authoring application: Smallpdf Desktop
MD5: 84c4b44538762e10b3687af97b98d9f8 SHA-1: bd3f95b928a08947dd320f7d3cd72364b0e24115 SHA-256: 67426eb3d7356a847c0b2caddc5d8bb4595a9973744c785d11cec7f8d400cc19
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical finding for a large number of external links, suggesting a link farm. ClamAV identified it as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing attempt. The embedded URLs likely lead to malicious content, aiming to trick users into downloading further malware or providing sensitive information.

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://lattaconsultants.com/uploads/1/3/0/7/130775518/zajusanuzire.pdf
    • http://gameoveryoulose.com/uploads/1/3/0/7/130738883/d2da56f7.pdf
    • http://nataliesnutrition.ca/uploads/1/3/0/4/130436204/c5af0758d.pdf
    • http://misdoc.com/uploads/1/3/0/7/130740465/6957017.pdf
    • http://nelsonbeatsthedrums.com/uploads/1/3/0/2/130272886/3779140.pdf
    • http://cantabridged.com/uploads/1/3/0/4/130436139/7159566.pdf
    • http://bestmassagescottsdale.com/uploads/1/3/0/5/130589241/7752781.pdf
    • http://eusaudavel.org/uploads/1/3/0/6/130604919/direbubelesesetev.pdf
    • http://tidaleffects.net/uploads/1/3/0/5/130589460/lunibiko.pdf
    • http://actusdailyhomesbrampton.com/uploads/1/3/0/6/130620573/126278.pdf
    • http://74-123-73-201.mgwnet.com/uploads/1/3/0/8/130815303/130815303.html#subject+and+verb+agreement+%28confusing+subjects%29+practice+1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000388e.bin
3defd33f34f4f26eaf3790c707d96bbdcdcbf1b86eb9099e991200db0f11a20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x388E 7708 bytes

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