Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3f6ebf20d88683…

MALICIOUS

PDF

73.4 KB Created: 2021-09-10 10:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7821d03fa6c65bc7e30190d9e1a0082d SHA-1: 0f811dcdeffec27cc4ef4c3234ff83de054151f6 SHA-256: 8a3f6ebf20d88683308fd7591c8c208cf6c41fa9088b139aa786d231b918d61b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by ClamAV, and heuristics indicate it contains embedded JavaScript and numerous external URIs. The embedded JavaScript likely facilitates the execution of malicious code or the download of additional payloads. The numerous external links, many on disposable domains and using UTM parameters, suggest a phishing or link-farming attempt to distribute malware or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=pdf+password+remover+crack+online PDF link annotation
    • https://mokhalasati.com/userfiles/files/48454789928.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/tejega.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/38956795782.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/rifeviba.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/10662575122.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/84590781686.pdfIn PDF document text
    • https://badrivishal.com/media/lexumewigaf.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/pezuxuw.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/gabotijal.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202196738354886.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/76201593836.pdfIn PDF document text
    • https://coevent.ru/upload/files/guwumejezekamebakup.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/66933584539.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/88905007837.pdfIn PDF document text
    • http://gr-chem.com/upload/files/97805718826.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/rugimimakek.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/45341253107.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f1bb4b0d3932de918873ea52886d4f27/juzudukokepikesarige.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/sovamufewatipabolofil.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/rufovavexekitulitajezozir.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/22880744832.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/68691204168.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/96831101200.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/24234020538.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/33124248789.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/62258175539.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_off0000e38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38F 10928 bytes
SHA-256: 84945386edd5b798c1def0354318c27ec7bca7307a45b2cf5353c16078684bc3
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.