Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95d55dfefb5adf4…

MALICIOUS

PDF

62.5 KB Created: 2021-09-08 19:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 552b5428136365e1dcdfe59da9f158c4 SHA-1: 49a5f2b7ce71d31a0f07e49e7edb7f790a22bb21 SHA-256: a95d55dfefb5adf45e66bde0218fabb491afb0967cb159a0565f67e84830dff6
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malicious content. The file's structure and the presence of many links suggest a tactic to distribute malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7247

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=livre+commerce+international+pdf PDF link annotation
    • http://saharun.org/uploads/ckfinder/userfiles/files/wufomemadojogodomoguzozim.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/kufex.pdfIn PDF document text
    • https://rippa.pt/files/file/rizilutezer.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/16967495655.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/39305417386.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210907200053.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/37131489025.pdfIn PDF document text
    • http://toroisg.com/public/images/files/zuzulefukemujiku.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/76572862806.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/51408914711.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b4f26e685---balikal.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/gufikekefexetax.pdfIn PDF document text
    • https://argumentua.com/i/file/40732054368.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/63870212834.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/4414698660.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/10842025897.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/muguporutikofawubemi.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/bovikewofexidatuzodan.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/8664957274.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/25847568174.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/telekuwe.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/89955035874.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/37263016271.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/fenosimavuvekose.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA62 10636 bytes
SHA-256: 39371afd5d9a2983d80140877a6e8e9a49dd05ada879f95a9b79fde7d2c4f21b

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