Malicious PDF — malware analysis report

Static analysis result for SHA-256 9939a7581c77c9c3…

MALICIOUS

PDF

32.1 KB Authoring application: Soda PDF
MD5: 9f472bb87c87b63dda748f003b8a0ad3 SHA-1: a2f66e16e0caead6b0a03b5bc7150c2e46231b54 SHA-256: 9939a7581c77c9c381116ae04d8a9b4218ae32b9a3dd3c54bad60160bc844f75
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, indicating a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. The primary attack pattern involves luring users to download further malicious PDFs through these links.

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://k2usa.it/uploads/1/3/0/6/130621140/wekitimavor.pdf
    • http://chicagotoeflschool.com/uploads/1/3/0/6/130604317/6270393.pdf
    • http://mikewilliamsmusicclasses.com/uploads/1/3/0/4/130477245/c8ca0f6f3544ebf.pdf
    • http://blackhillsbiking.com/uploads/1/3/0/5/130541600/972f12b97325e00.pdf
    • http://www.flyyogastudio.com/uploads/1/3/0/6/130621194/gofom-jorage-gepusuxewimewug.pdf
    • http://nicoleraucheisen.com/uploads/1/3/0/5/130588961/gipapop.pdf
    • http://nikkiheyder.com/uploads/1/3/0/6/130605161/zujevesojojet_pipekuda_jugukawateguwe_tusud.pdf
    • http://northernsound.com/uploads/1/3/0/6/130604281/d83917b594e.pdf
    • http://ravenwheel.com/uploads/1/3/0/5/130590058/mumudupibo.pdf
    • http://www.suitlandhsmasterplan.com/uploads/1/3/0/6/130621388/sipuki-resomusal-vuvegiwati.pdf
    • http://rentalspacificgrove.com/uploads/1/3/0/4/130483804/gubapewufuvopodi.pdf
    • http://www.alterendo.fr/uploads/1/3/0/4/130476624/sujatowu.pdf
    • http://a3vinsidesales.com/uploads/1/3/1/0/131070674/540014.pdf
    • http://trtidalwave.com/uploads/1/3/0/6/130605373/e9aa03f7.pdf
    • http://aomenduchangeluosizhuanpan.br3h.com/uploads/1/3/0/5/130588745/130588745.html#mele+kalikimaka+uke+chords+c

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000023ee.bin
ca18dced6f73b35b5db48604f1a7f7b2393b16f22c0db800a5d2f47b644b97d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23EE 7676 bytes

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