Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1448ad1b225a4d…

MALICIOUS

PDF

51.2 KB Authoring application: ImageMagick
MD5: 3750033db70bd6bd31edffceae54d1b9 SHA-1: abbb9b7e7699331b14647d6b350aeca0bd90dc89 SHA-256: 8c1448ad1b225a4d431b47be78527fb3902b703dccaa9f74dcca335aafa16315
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the link farm suggests a delivery mechanism for further malicious content or phishing lures.

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://nwrealtybrokers.com/uploads/1/3/0/6/130604675/bad52c442a.pdf
    • http://axlecreek.net/uploads/1/3/0/4/130483872/4491f3.pdf
    • http://bodybycreation.net/uploads/1/3/0/7/130776037/zivexegove_fidam.pdf
    • http://villagepizzaobx.com/uploads/1/3/0/2/130289256/5038233.pdf
    • http://larybc.org/uploads/1/3/0/5/130551247/vunis_tasaxixusuboma.pdf
    • http://sunflowerandwillowsco.com/uploads/1/3/0/4/130436085/robijebawulewu.pdf
    • http://tempotempo.no/uploads/1/3/0/6/130620971/kifokepup.pdf
    • http://ranchopescadero.net/uploads/1/3/0/3/130379415/doxagurutemino-tekokesabit-zuvudesukep-sifakem.pdf
    • http://renmach.com/uploads/1/3/0/6/130605283/4dffb.pdf
    • http://oneactioncalendar.org/uploads/1/3/0/5/130544131/1039dc2.pdf
    • http://prime-yourself.com/uploads/1/3/0/6/130622013/00a063.pdf
    • http://synergyassistllc.com/uploads/1/3/0/7/130775386/nimetigiber_ziwojeju_ruwonolajazegun_kinovezizamupap.pdf
    • http://kk9walks.com/uploads/1/3/0/8/130873810/eed080.pdf
    • http://www.bonfireheart.de/uploads/1/3/0/6/130620431/130620431.html#o+admir%C3%A1vel+mundo+novo+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d9b.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9B 2652 bytes
font_01_sfnt_off00006aad.bin
d548c2a50b7d0e24c665bfaa23caa1edca3d46a0fa2e74099118f2de0fea2f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 11584 bytes

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