Malicious PDF — malware analysis report

Static analysis result for SHA-256 d169122ff7cd27ba…

MALICIOUS

PDF

44.6 KB Authoring application: OpenOffice.org
MD5: 280f37f7d7a52221a8cfebd058f7ecd6 SHA-1: 559e96a89e7ca11845e9429a7e389cb5e0fb117d SHA-256: d169122ff7cd27babff0baa9513de147922310adad4a400f0d63d722b267ae34
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the extensive link farm points to a delivery or redirection strategy.

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://texanhomestudy.com/uploads/1/3/0/3/130379824/7112714.pdf
    • http://njetd.com/uploads/1/3/0/5/130550713/burijogixenu.pdf
    • http://portlandareabankruptcy.com/uploads/1/3/0/2/130272483/13a725d60018f9.pdf
    • http://alissajacobscmt.com/uploads/1/3/0/5/130551418/wigagowejolozaz.pdf
    • http://moodieshop.com/uploads/1/3/0/5/130539554/3167124.pdf
    • http://leruxe.1331.wtf/uploads/2020/01/28/9b213.pdf
    • http://altitudefitnessservice.com/uploads/1/3/0/3/130313149/9152365.pdf
    • http://dtailspetboutiquespa.com/uploads/1/3/0/3/130323196/4093031.pdf
    • http://charlieleegeorge.com/uploads/1/3/0/7/130739472/niluri_gutaz_delajenosasa.pdf
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/2/130270864/130270864.html#gce+o+level+format+english+report+writing

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000143e.bin
8fd935276df9759301213a9ce04ca252a145a585451be6425902abb9fc3bfc23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143E 9108 bytes

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