Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed5b3e6be8e3b7c…

MALICIOUS

PDF

72.0 KB Created: 2021-05-23 09:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a05f13344ac26c40f1129fb63df1234f SHA-1: 1e277c8b7f39ec5f87519c598f0cb29dab4eeefe SHA-256: 6ed5b3e6be8e3b7ccd545867f159813078160a7e82d09e60643d24c6b9b8df6c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as a phishing trojan. The embedded URLs point to various PDF files hosted on compromised websites, suggesting a phishing campaign. The document body is heavily obfuscated and does not provide clear textual content, but the presence of external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/5th9j7evmdk3ri320b867cnkab/93162716367.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/iapmqv18h3kj6v7pbq4ik9q2b1/rofarum.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f2a31675---kapat.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849535c05ac---povulu.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5e4c4c8cd---valifilopagilunigejuzeb.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3b3289e0---fuxikotiserib.pdf
    • http://humanitool.ru/userfiles/file/99016519762.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f692493c7---kavajekuz.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/e20etk1ip07c56905mcsn0696q/bisajatositejo.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/891b2884a65e2291df3c9fc9ed1a6722/xunawolosulel.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/38ba23eb3bccbf48083bb489d9113776/43520799240.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/2ba444f41f447b002c89e8dbbff30c4a/93560318899.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/449dded79dba9131f82f42b8c9710433/lilepuzexewufutunemisamul.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/iv5jh19gm7qb5u8oi1s0fn60ed/fejutivotaravokaledelu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+is+ctrl+c+in+mac
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daab.bin
4fd611787b79bd734e5ef9190663e6a0f1bf2d1c34ce802077003b483de6ca12
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 5052 bytes
font_01_sfnt_off0000ebb9.bin
f72ffdde9f96cec8cd2b51720cba0d0e68bde28f3e6103e048899b90a3f10044
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 16020 bytes