Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bdb246af4ab23a…

MALICIOUS

PDF

51.6 KB Authoring application: SWFTools First seen: 2021-09-18
MD5: 22921f678adc0511435a15468ad7cab0 SHA-1: 2a1c2af51ad43d540f047050a3e90588804f0e75 SHA-256: d7bdb246af4ab23a1d8ca48885eafe1e55babd259a679dcd7812839027f06418
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://bikesbeersandbagels.com/uploads/1/3/0/8/130874313/bb1aab1eb.pdf In PDF document text
    • http://dejavumeridian.com/uploads/1/3/0/5/130540240/nomimavizu-sifozevifedidoj-noberede-sebipuvubobosi.pdfIn PDF document text
    • http://mingsheng88yulecheng.br3h.com/uploads/1/3/0/7/130775969/ac596.pdfIn PDF document text
    • http://saurabhbhatt.com/uploads/1/3/0/2/130273625/7609416.pdfIn PDF document text
    • http://nomadchurch.net/uploads/1/3/0/4/130435876/titok.pdfIn PDF document text
    • http://mail.reisebazar.ch/uploads/1/3/0/8/130813317/pujed.pdfIn PDF document text
    • http://agence.bailleurprive.fr/uploads/1/3/0/6/130639916/zepolosijes.pdfIn PDF document text
    • http://workwatcher.com/uploads/1/3/0/4/130476652/nesamigi.pdfIn PDF document text
    • http://www.agrimax-intl.com/uploads/1/3/0/4/130435877/mojame_morolomukujo.pdfIn PDF document text
    • http://chriswojda.com/uploads/1/3/0/6/130620736/ce1a3ff394.pdfIn PDF document text
    • http://www.commercialcompliance.com/uploads/1/3/0/2/130270905/wenupowazoxep.pdfIn PDF document text
    • http://thesustainables.net/uploads/1/3/0/2/130289733/guwusijix_punaremufewilab_zoxapado_madiporenikoz.pdfIn PDF document text
    • http://msspadc.net/uploads/1/3/0/6/130640220/luxoxuxubawuzuta.pdfIn PDF document text
    • http://alessiadana.com/uploads/1/3/0/4/130435631/5787713.pdfIn PDF document text
    • http://nabroad.org/uploads/1/3/0/5/130590297/zilesimebedajux-todotu-visizeponozipax.pdfIn PDF document text
    • http://minerhosting.at/uploads/1/3/0/3/130379610/130379610.html#esc+atrial+fibrillation+guidelines+2017+pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5867 16040 bytes
SHA-256: f7890e05e2d1e3a35e322ad8e6f5ef2e095a852fae906ab5a3d954c4312a7e80
font_01_sfnt_off00006fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 7968 bytes
SHA-256: 13138940220a6d27b0fa6856c20715f304a87b897cf36dc395dda07939730dbc

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