Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f14a54b987a227f…

MALICIOUS

PDF

89.4 KB Authoring application: PDFBox
MD5: fbb31c2a61690b169300a4ab12b56dc6 SHA-1: ce5fb8f9874b58132212bb9ebd944b7dceac7f00 SHA-256: 8f14a54b987a227fff7498af97e1d3a8ccd424354859f67bf0221455bf4e7728
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This technique is commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mgeducation.net/uploads/1/3/0/3/130379596/nimalikosiwo.pdf
    • http://plutusmerchants.com/uploads/1/3/0/6/130640031/nonositezubo.pdf
    • http://aljbrand.com/uploads/1/3/0/5/130551226/pixidi.pdf
    • http://ninktat.com/uploads/1/3/0/3/130323532/xufozoboludajexa.pdf
    • http://dovernewlife.org/uploads/1/3/0/7/130776218/zurusazak.pdf
    • http://theroyalapartment.com/uploads/1/3/0/4/130435835/3228183.pdf
    • http://amhomeinspectionsinc.com/uploads/1/3/0/6/130604218/6734409.pdf
    • http://interview-tools.net/uploads/1/3/0/5/130539584/ea64d82c39d4.pdf
    • http://rbcdublin.org/uploads/1/3/0/6/130640225/tarekerafo.pdf
    • http://bezzies-bakery.com/uploads/1/3/0/7/130776418/0596cd75d3d.pdf
    • http://thenewmathclub.com/uploads/1/3/0/6/130639269/sowiwuwawaluruzofu.pdf
    • http://nullaginecrc.net/uploads/1/3/0/3/130379087/8700294.pdf
    • http://ds4all.tech/uploads/1/3/0/7/130739944/vezakoxosisi.pdf
    • http://teamphoenix.info/uploads/1/3/0/5/130550936/dexojid_vabibasazevog_zitiwor.pdf
    • http://819.bpmtc.com/uploads/1/3/0/6/130604758/130604758.html#mesenteric+adenitis+aafp

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b36.bin
f6db24b57e176439aed63a38e29192baa0b62f432a11220f08cac3c65776e3f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B36 10460 bytes

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