Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8553f4382bd741f…

MALICIOUS

PDF

36.7 KB Authoring application: Soda PDF
MD5: a78c4a14ebda472dafd489ee8034d0d2 SHA-1: 7e5b791e102c54c72a82e3411a7f21d6b8efc239 SHA-256: d8553f4382bd741f331d7732ce44cc5b645097693abdaf94b7a2a19bddd5a5a4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary attack pattern observed is a link farm, with 31 external PDF links embedded within the document. These links likely serve as a redirection mechanism to phishing sites or malware downloaders. No scripts were extracted from this sample.

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://northolmstedgymnastics.com/uploads/1/3/0/3/130379081/mibuxefonupapi.pdf
    • http://fancyflushrestrooms.com/uploads/1/3/0/8/130874620/tifaben-juwotarafezuk-pifisomut-kegulexijex.pdf
    • http://laparoscopic.info/uploads/1/3/0/2/130272853/0714cbf50aa6.pdf
    • http://www.huabba.de/uploads/1/3/0/5/130550675/jixuja.pdf
    • http://needlefreeconnector.com/uploads/1/3/0/6/130603724/2694110.pdf
    • http://twofriendsgames.com/uploads/1/3/0/6/130620168/9862405.pdf
    • http://lotusartistries.com/uploads/1/3/0/2/130291779/xofumilabo-fitoxuk-xirixapoliziwo.pdf
    • http://churchillclubmedia.org/uploads/1/3/0/3/130323342/rusanup.pdf
    • http://subaru-crosstrek-deals.com/uploads/1/3/0/5/130588702/zetowupag-zodaginesad-tewebonefizo.pdf
    • http://kacigraceco.com/uploads/1/3/0/5/130590209/5493904.pdf
    • http://ajettreiki.com/uploads/1/3/0/6/130639197/gapepefoweferut.pdf
    • http://www.pocdogs.org/uploads/1/3/0/4/130475973/dureb.pdf
    • http://www.svcarts.com/uploads/1/3/0/5/130550885/5858458.pdf
    • http://mylonglocks.com/uploads/1/3/0/6/130640200/407862.pdf
    • http://locationstomap.com/uploads/1/3/0/7/130739200/76f32b.pdf
    • http://kattagast.com/uploads/1/3/0/4/130476738/3701530ba06.pdf
    • http://zontanorthsydney.com/uploads/1/3/0/3/130323222/tuwisamabep.pdf
    • http://www.divasmusicproduction.com/uploads/1/3/0/5/130539260/parejovazajozulaxu.pdf
    • http://myabloomstore.com/uploads/1/3/0/2/130289775/f6318634.pdf
    • http://www.mingbridgetrading.com/uploads/1/3/0/7/130775490/23f11212f8c9.pdf
    • http://sta-66-99-58-196.ladse.org/uploads/1/3/0/9/130969405/130969405.html#navisworks+freedom+2018+user+guide+pdf
    • http://myabloomstore.com/uploads/1/3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001dcb.bin
6acbf5fa0c48e206d297b58f295621910eab9e6cd6222199f8cb6e224e30a024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCB 8624 bytes
font_01_sfnt_off00003a24.bin
afd8868629b61d85ec32a8a0de1ca84da82d48156cdd7447d7c4f51403cf5149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A24 5244 bytes

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