Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2923665dc34fd7…

MALICIOUS

PDF

35.6 KB Authoring application: Poppler-utils
MD5: 26ab95cdf0e153275c9e0aafa12db9d5 SHA-1: 7920bbce97d2706a7a98d6fc68b38699e7b1154e SHA-256: 8c2923665dc34fd7983d406161f3acd31b4780cc30a73d1fb57a1b09e81637f9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample, and the document body was heavily obfuscated and truncated, preventing a more detailed analysis of its specific lure.

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://www.curtainsandblindsnz.com/uploads/1/3/0/4/130435685/603740df2644fc.pdf
    • http://realorlando.net/uploads/1/3/0/2/130289205/gitiwe.pdf
    • http://mentorgeek.net/uploads/1/3/0/5/130540284/gerolavo-rivakezupulono.pdf
    • http://sarahvermette.ca/uploads/1/3/0/5/130550777/tizunosama_gonasanozus.pdf
    • http://newzealandcreativespacesstudioweebley.com/uploads/1/3/0/4/130435583/5675623.pdf
    • http://myentouragemusic.com/uploads/1/3/0/7/130740616/9909850.pdf
    • http://tripbuys.com/uploads/1/3/0/7/130739368/voniwuxa.pdf
    • http://epiplas.com/uploads/1/3/0/6/130604382/12a79f2ee6a5.pdf
    • http://peaksmobile.com/uploads/1/3/0/8/130813117/7463369.pdf
    • http://angryhealthcoach.com/uploads/1/3/0/5/130590205/fefuso.pdf
    • http://usedofficechairs.net/uploads/1/3/0/7/130739210/1588770.pdf
    • http://shannaspetsupply.com/uploads/1/3/0/2/130271219/9179b.pdf
    • http://hilleke.info/uploads/1/3/0/4/130489143/48e30655b4b8.pdf
    • http://nenzhengqiandeqipai.br3h.com/uploads/1/3/0/5/130588695/130588695.html#adjectives+that+start+with+the+letter+v+to+describe+a+person+positively
    • http://angryhealthcoach.com/uplo

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000338e.bin
0a01165903b2f182f21efdfe8e4140315fa48006c093a31cb87c0fbd8e89e6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x338E 7412 bytes

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