Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2e880eaf6ac543…

MALICIOUS

PDF

41.2 KB Authoring application: Karbon
MD5: e60455b3baedb7af0a9af98a55dedfe7 SHA-1: bc5ab11332d004de565815ed2bf6e727cadd9998 SHA-256: cf2e880eaf6ac5439f35b18e1e85039f5520d08600d460d270e7c254829ec0be
152 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, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. No scripts were extracted, but the sheer volume of linked PDFs suggests a coordinated effort to distribute malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://burkesplumbingandheating.com/uploads/1/3/0/8/130874257/taponom.pdf
    • http://statussphere.com/uploads/1/3/0/7/130739891/7d03747ce739b4.pdf
    • http://superyachtregattas.com/uploads/1/3/0/7/130738548/ragizogodapewoxuv.pdf
    • http://microsoft-office-365.online/uploads/1/3/0/5/130588816/1df4f1981.pdf
    • http://mystoretrackr.com/uploads/1/3/0/2/130289558/22129c954.pdf
    • http://nuobeijinghotel-chinese.devsite-1.com/uploads/1/3/0/6/130603789/fetivomezedoxizar.pdf
    • http://mfwwinecompany.com/uploads/1/3/0/8/130815095/ginugivi.pdf
    • http://carrotmeetscookie.com/uploads/1/3/0/5/130543084/nukidedudulu.pdf
    • http://spokaneboudoirphotography.com/uploads/1/3/0/4/130476242/jinopi-zafagafelav-zapupogun.pdf
    • http://hostmaster.dwolf.eu/uploads/1/3/0/7/130740477/8776953.pdf
    • http://hollywoodalternative.com/uploads/1/3/0/8/130813497/b1d3ea92.pdf
    • http://puntodeapoyo.es/uploads/1/3/0/4/130476981/7532161.pdf
    • http://sta-66-99-58-220.ladse.org/uploads/1/3/0/6/130622091/130622091.html#how+much+is+carpal+tunnel+surgery+cost

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000486c.bin
8744a5dca77da08e765c67b72821f5819e4017a146c8ef6a07ad130fde1fc212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x486C 8244 bytes

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