Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d84688df3233aea…

MALICIOUS

PDF

40.5 KB Authoring application: Poppler-utils
MD5: 240bfecef4d12df00aabafd64dc75519 SHA-1: dac02660830049bdc8aa075dfd3e3ee6ae8c601b SHA-256: 4d84688df3233aeac11a46a81bb99653f142c43446d629bb7e6b91eb220bc9f6
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support the malicious nature of this file.

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://power4lifenow.com/uploads/1/3/0/4/130435635/divotefu.pdf
    • http://jer-zu.com/uploads/1/3/0/6/130639895/nuxepivexenevi-kiponaniveberiw.pdf
    • http://hasbropowerrangers.com/uploads/1/3/0/5/130588231/9381c4.pdf
    • http://gufiva.achdziewczyny.site/uploads/2020/01/28/e480b8ce16b68f8.pdf
    • http://agelessiq.com/uploads/1/3/0/6/130620679/bitedixidavuxexeguze.pdf
    • http://robanka.com/uploads/1/3/0/8/130814591/02ae175d.pdf
    • http://thymomahope.com/uploads/1/3/0/6/130604386/9457785.pdf
    • http://openmasajes.net/uploads/1/3/0/6/130604610/pinezodomenepi-zinepodiwetiwem.pdf
    • http://cityonloc.com/uploads/1/3/0/2/130271167/130271167.html#list+of+frequently+used+adverbs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001187.bin
f50577013f461fe79fc924788acfb0295b3a67995fcca4f3d5c5337dd30a2872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1187 7868 bytes

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