Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62e46d3de8b7dec…

MALICIOUS

PDF

43.1 KB Authoring application: Mobipocket Creator
MD5: cec9c8687fa2d2b637121cf57c17b28c SHA-1: 88217acfb07340436f96e953564ee66ffcaa2c54 SHA-256: a62e46d3de8b7dec8f5c5a5ea102df4d25859f47bd6008c8416e4b158f3d94b3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO manipulation or to distribute malicious payloads. ClamAV identified this as Pdf.Dropper.Agent-7908481-0, and ML classification strongly indicated maliciousness. The embedded URLs are the primary indicators of compromise, suggesting a distribution or redirection mechanism.

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.Dropper.Agent-7908481-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7908481-0
  • 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://pursuitofcraftiness.net/uploads/1/3/0/4/130483256/dd603613969.pdf
    • http://www.newburyfest.co.uk/uploads/1/3/0/6/130620708/3604416.pdf
    • http://darciecreates.com/uploads/1/3/0/8/130874569/1d34078f33.pdf
    • http://www.pl-eshop.com/uploads/1/3/0/7/130739029/vedubejipefube.pdf
    • http://ackoeltechniek.nl/uploads/1/3/0/7/130776678/b5cfb0378862e.pdf
    • http://colossalconversions.com/uploads/1/3/0/7/130739886/7507994.pdf
    • http://www.waterswindowcleaning.com/uploads/1/3/0/7/130776409/xusebosazofupezezi.pdf
    • http://positivitymagic.net/uploads/1/3/0/4/130483136/2832516.pdf
    • http://alphaconstructiondevelopment.com/uploads/1/3/0/6/130639734/rubojow.pdf
    • http://more-beautiful.com/uploads/1/3/0/4/130488382/mirukufawaso.pdf
    • http://teszeri.com/uploads/1/3/0/6/130620853/mapizukan.pdf
    • http://behinddallas.com/uploads/1/3/0/5/130550750/bumis.pdf
    • http://theprotocolandetiquetteschool.com/uploads/1/3/0/2/130273581/4130903.pdf
    • http://lsep8.bpmtc.com/uploads/1/3/0/4/130436079/lariwoxutinuvizeb.pdf
    • http://baijialeduizijiqiao.br3h.com/uploads/1/3/0/7/130738738/130738738.html#download+picture+of+serenity+prayer

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d98.bin
00ad012d5baaeb743074f00edf5185ad5abe22d5a573125b3cf61c1181d8ff73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D98 8460 bytes

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