Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cdce39183ff821…

MALICIOUS

PDF

36.0 KB Authoring application: Solid Converter PDF
MD5: ac936171494afc6f08f74e24b6a7f7c7 SHA-1: cde2011299dac480c677b1d98e0ab1cdaff6643c SHA-256: 02cdce39183ff8219582de4d7972af656659635c9b89bd05a367097c22024621
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links to external PDF files, disguised with seemingly educational titles. This behavior is indicative of a link farm or a mechanism to distribute further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to potentially harmful sites or downloads.

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.Dropper.Agent-7758964-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7758964-0
  • 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://bayareasomaticpsychotherapy.com/uploads/1/3/0/4/130488265/kezojuworisomor_pigagaruxuge_ragatamar_noves.pdf
    • http://kewosumi.trasir.ru/uploads/2020/01/28/merojizo.pdf
    • http://robinjoyphotography.net/uploads/1/3/0/2/130272435/bofeva_meresedu_bujiv.pdf
    • http://koriwhitby.com/uploads/1/3/0/4/130476089/nufenefudegex_runewi_pulinalazik_xujadu.pdf
    • http://josephwalker.net/uploads/1/3/0/6/130639915/5882e00.pdf
    • http://montgomerytattoos.com/uploads/1/3/0/3/130323360/ruvuwa.pdf
    • http://ccevenice.com/uploads/1/3/0/4/130476830/9652231.pdf
    • http://norwoodhighschool.net/uploads/1/3/0/2/130291551/2739422.pdf
    • http://loftzone.net/uploads/1/3/0/4/130491271/130491271.html#scientific+method+virtual+lab+glencoe+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121d.bin
f38ab4e3b3993835e5aa09bcf54046434f7becb7e8ce719924cbb9cb4cd5a7a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121D 8168 bytes

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