Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51017e4d1536922…

MALICIOUS

PDF

31.3 KB Authoring application: Scribus
MD5: d6011cfcf0a3120a017f85f4ac532c2f SHA-1: c00dad00a01efe8d27c33f2d2b64533cb03bae16 SHA-256: f51017e4d1536922a44ae096eecf2301d2f820a0685ca2df815ae2e6926ba61c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO manipulation or to distribute malicious payloads. 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 'ecological footprint worksheet answers' and 'carbon footprint', suggesting a lure to engage the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://tudientot.com/uploads/1/3/0/5/130539691/847321.pdf
    • http://yesonzforpvsd.com/uploads/1/3/0/3/130312929/8c99fc73bf.pdf
    • http://missbellasfriends.com/uploads/1/3/0/6/130603884/fuses.pdf
    • http://pazur.kupitzerkalo.ru/uploads/2020/01/29/eb9f19a1.pdf
    • http://whiteoaknaturals.com/uploads/1/3/0/2/130291908/9954491.pdf
    • http://mountshastamassage.com/uploads/1/3/0/5/130543276/4549577.pdf
    • http://thehnossaproject.com/uploads/1/3/0/6/130639516/130639516.html#your+ecological+footprint+worksheet+answers
    • http://thehnossaproject.com/uploads/1/3/0/6/130639516/130639

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002909.bin
10d584082565c2b0c43d97e0923ceacbc288bf7cd5461bdfc6de20e97049d44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2909 7524 bytes

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