Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcc2c893dbf3fda…

MALICIOUS

PDF

73.4 KB Created: 2021-09-15 23:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42fdca0950fd9575d0f3423928c8b3d1 SHA-1: 5f336a3d72edb369d34e6aa5d8ca910601038208 SHA-256: 5bcc2c893dbf3fdad89f71c1544a33690fe7388ae575d2b7cd43dc2c5d3e021a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. Heuristics indicate the PDF is designed to redirect users to external content, with one URL specifically containing a 'mod apk' term suggesting a potentially malicious software lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6308

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://pixomot.ru/uplcv?utm_term=parkour+race+mod+apk
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210903051143.pdf
    • http://goldsunjsc.com/upload/files/16840295957.pdf
    • http://campfirewtx.org/userfiles/file/riluxuvusoxogadesaji.pdf
    • http://starcity-vinhomes.vn/app/webroot/img/files/43340931569.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/4l3ahltmot83id9eb3esa0g6pe/22389952427.pdf
    • http://juncheng.tw/upload/files/20310193595.pdf
    • http://epicridesnepal.com/files/61898409339.pdf
    • https://rafaela-motores.com/userfiles/file/4665062225.pdf
    • http://szentdorottyapatika.hu/files/92263391697.pdf
    • http://popmetre.com/news/files/loxeperirafox.pdf
    • https://mayphoviet.com/media/ftp/file/83545077065.pdf
    • https://economiadecomunion.net/ckfinder/userfiles/files/kazetexu.pdf
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/41895447161.pdf
    • http://soft-pro.hr/upload/datoteke/rumumaxi.pdf
    • https://gtnet-engine.com/ckfinder/userfiles/files/sidedewaludibukivasopo.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc663d073b---kuxezolufumiruliz.pdf
    • https://rm-parketi.si/uploads/66818500660.pdf
    • http://www.dilipprabhavalkar.com/images/file/dofegebufibibefuzetitot.pdf
    • http://www.moyekolodin.com/files/zisomerovepawokumodevavem.pdf
    • https://angelsforwarriors.org/userfiles/files/83777815806.pdf
    • http://strategie-online.net/catalogue_dynamique/file/kukudovixulawobojoru.pdf
    • http://armanetti.com/images/vebumezapixelarubo.pdf
    • http://c-amc.com/upload/files/45870248982.pdf
    • http://achwvs.love-mrt.com/upload/files/52671513477.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e436.bin
6c93d3f3c02efc83ede0d7bf765c1b0df92cee7808ec94126dc0b15edfaff604
pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 18928 bytes