Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa26813bb381617…

MALICIOUS

PDF

104.6 KB Created: 2021-07-01 10:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f3f28a9256160063950d7e04d5046e8 SHA-1: 684a4bcdf60a79c8f2a7a2306fe2a7ebe00d4333 SHA-256: bfa26813bb381617c11b0335507a41fe39018d08d7f5a655d2754cc915b4cf79
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. It contains numerous embedded URLs, many of which point to other PDF files hosted on potentially compromised websites. The presence of PDF_URI and EMBEDDED_URL heuristics suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://parfumkin.ru/files/files/88631223807.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/xatezonulosirexozaj.pdf
    • http://paliukenas.lt/i/File/43255537781.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/68731212945.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/eo95rau34qjp3kjoqpd55bmvaq/rizem.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608680d9d48e9---43088702447.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/9a3c6d1e22e71e9e483c70003f4caa07/42300212334.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/nq1hokitk9e3v5vgt30uba6md0/28538271910.pdf
    • http://trans-serwis.com/userfiles/file/55309573498.pdf
    • https://xlspandoek.nl/userfiles/file/rolanewenidexuzeg.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ccae53993---18690506780.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/jei4b5spro13paenjmmme3ni3n/vejemesodumetuvub.pdf
    • https://elegune.net/files/galeria/files/77981756436.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16070899f9b6f2---nuwegab.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4349a67ff064ba230405f9597bf5fdfd/24438343442.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/34b9e6312dbf3c879492a9fc16350ce0/47907205978.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/vdil1e0rf6lac5kd217ukvg8sp/dekipinerelip.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c82ab0da2a7ee7b5cbf2e5efdf127c9e/xitubatitumabimekum.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945743388b4---lusekipuw.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609279e1a8698---gofasubigipevaxatog.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4a3cc521---84495872329.pdf
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/41107322887.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/20550b70b0e03c04de3c291d7a05e46e/20041952851.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b4cfe9cb6f9f1da06088aacfb8992bfa/pekejozuwilapuve.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/40a57730f30eecab4d1379b26690465d/25336152191.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=all+cursive+writing
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135f0.bin
961e18bdca02bec680e9585c4278272961fe011acfefe86152579c2663199658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F0 20224 bytes
font_01_sfnt_off00016a2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2F 16792 bytes
font_02_sfnt_off00018246.bin
e95fb82e85da86c3ad539f1cc60306b8f10c8476e0b902832e779f13992f1d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18246 10356 bytes

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