Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be2ad2837ee62b8…

MALICIOUS

PDF

41.4 KB Authoring application: Solid Converter PDF
MD5: e009945d19d6263810146ab653811d67 SHA-1: ddd246a8fd06c1513628ae0ce6b3ad40fd107d39 SHA-256: 8be2ad2837ee62b840706016392c1ee506489291cb611329a9022b8a828bb414
152 Risk Score

Malware Insights

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

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 distribution mechanism for further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly support a malicious classification. No scripts were extracted from this sample, limiting the analysis of direct execution behavior.

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://amysachievers.com/uploads/1/3/0/4/130477455/kugemisofekewuba.pdf
    • http://bitter-buffalo.com/uploads/1/3/0/5/130588693/bdda3144a.pdf
    • http://nhrealestate.org/uploads/1/3/0/5/130590029/6ae53ad9d6ae.pdf
    • http://cabaproject.com/uploads/1/3/0/3/130313803/2586603396558b.pdf
    • http://quitt-ng.com/uploads/1/3/0/5/130588545/6341531.pdf
    • http://wewantcoolstuff.com/uploads/1/3/0/6/130604756/zovuvofebepuf.pdf
    • http://noralpha.com/uploads/1/3/0/7/130740340/nekebuwaworavawut.pdf
    • http://www.hydrowater.shop/uploads/1/3/0/8/130815311/149b5328.pdf
    • http://indianapolistruckingacademy.com/uploads/1/3/0/6/130639393/63ad5f782248.pdf
    • http://go.skyyomedia.com/uploads/1/3/0/7/130776783/senezo-selit.pdf
    • http://sheridanpollinaphotography.com/uploads/1/3/0/7/130739183/6678307.pdf
    • http://adsl-63-204-18-19.benefitplans.org/uploads/1/3/0/8/130813934/130813934.html#how+to+set+an+oxy+acetylene+cutting+torch

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a48.bin
e25a6e2e5a8250baf841113cd3bac82596f6c110528434c4bdbdbb8122898b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A48 8440 bytes

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