Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edb5d8ab2004c41…

MALICIOUS

PDF

39.1 KB Authoring application: GIMP
MD5: 069b83a99a98fd8ca36e37ea5810b45f SHA-1: a4b38cd470fd53bcc777ad6fffc522c8c2191a1d SHA-256: 1edb5d8ab2004c415af9ea422754d9e3ec82f863c0ac877336981f70362687c7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier further support the malicious nature of this document, classifying it as phishing or a potential malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://munding-medientraining.com/uploads/1/3/0/2/130288565/fapekopimifu.pdf
    • http://simplyberger.com/uploads/1/3/0/7/130740323/tidazija_gaxogobona_dedoko.pdf
    • http://emmeline-kellett.com/uploads/1/3/0/6/130620483/3685601.pdf
    • http://myearlylearningbox.com/uploads/1/3/0/4/130477335/jufamoxudoluxub_fidiko.pdf
    • http://whatsapp-computer.com/uploads/1/3/0/4/130483592/130483592.html#sulfuric+acid+msds+australia

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001049.bin
ed1df53d87c065477a83785820a332ecf5cac7bb6c8f53817a2ba8e965498cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049 8440 bytes

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