Malicious PDF — malware analysis report

Static analysis result for SHA-256 764f8f95889429a9…

MALICIOUS

PDF

28.4 KB Authoring application: Smallpdf Desktop
MD5: da4710c78291bc5bdd985b44eb826d08 SHA-1: fd6788447f67b5a3d353e0c5cf542bce2ef938d7 SHA-256: 764f8f95889429a979289d88568924a8f7b9b5c91b9500f669222a5a2598cba8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. This pattern is indicative of a link farm used to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or redirection lure.

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://mnappliance.com/uploads/1/3/0/7/130738578/f0fcf6.pdf
    • http://ladytchotchke.com/uploads/1/3/0/3/130323835/mawidovisa.pdf
    • http://sekedamedia.com/uploads/1/3/0/5/130551904/belugezejep.pdf
    • http://coppiceandcanvas.com/uploads/1/3/0/2/130271121/605adb2f6.pdf
    • http://americanstepdance.com/uploads/1/3/0/6/130620313/jewilopulutoma_xotafijudigefu_zalebovededab.pdf
    • http://sharegenki.com/uploads/1/3/0/7/130740266/4974885.pdf
    • http://trafficlynx.com/uploads/1/3/0/5/130539825/7415991.pdf
    • http://ashnicophotography.com/uploads/1/3/0/6/130621557/gutekirof-taturoro-forop-xupijidalujelez.pdf
    • http://asociacionmindfulness.org/uploads/1/3/0/7/130739510/bumurowirujavifimu.pdf
    • http://e-z-cam.com/uploads/1/3/0/7/130740169/50e30735b795.pdf
    • http://juliejesternewman.com/uploads/1/3/0/2/130271108/130271108.html#acrobat+reader+change+pdf+size

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001ac3.bin
bf9148e5b3b16fe4b72d39242a9724ffba716c7d2f31d7567b07874a63e538d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC3 7084 bytes

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