Malicious PDF — malware analysis report

Static analysis result for SHA-256 0733fdd8c7b26f7d…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 01:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f4cbdcd15d24cc7c33c6aed1aa7d113 SHA-1: 7bf5343c8b986f696182ccce3e727e60f7e168a1 SHA-256: 0733fdd8c7b26f7dcf0c37c851d308a032b80f675bd2139de404e8437d78781d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to execute malicious actions. It also features a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users to phishing sites. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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 https://crysiq.ru/uplcv?utm_term=example+helm+chart
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c27c4acc829---80308897868.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2f99e629e---wonusux.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70121a4778---nugirurotikoxiwujefa.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tia2t0vevj6l38qef4h9af6697/44749143971.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d1361070fc36635635b3aefa2a2be1eb/munogupoxedosezorowejike.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ed5f2882---bibegufivizugezowagodili.pdf
    • http://phantasos.org/userfiles/file/ronat.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/60698cbad071f7473e2a615ac81b0b36/76325506334.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b8d7c25d565444f4b57020d63a50acfc/supudif.pdf
    • https://www.passion-rnd.com/upfile/files/2021/06/20/temenanofatiripid.pdf
    • https://hasekei.jp/userfiles/file/livojubudetubivede.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/6a8881b9eb251e81938119e14a80060a/53287719944.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e9aa20c6---kibazigeri.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d7bb3fa487e40f4eab02eb6397afd186/91192695804.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e027f26b3659fca25b69bd59233acbcb/6698433173.pdf
    • http://planbmedia.hu/files/12246741284.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05e5fc4cec---musikewojazodijureseveko.pdf
    • http://daearesort.com/FileData/ckfinder/files/20210608_235646E194D452A6.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/wotenazi.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608711c62967c---kokalavixanira.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077815d0cb03---poravixojiruz.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adf66ae8550---65801642484.pdf
    • http://bukharasuwanee.com/sites/default/files/file/41470628899.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/d9c613faf941b6f16e35f28ffb4543b9/tavubesuw.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b40a8e11fcde2e40a190448a09fd305b/lalemasoxo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off0000ed79.bin
44dbf9066f2a1395dbcb2ab4dca958711af782d9e9b3ca1a202c621a29e751f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 10240 bytes
font_01_sfnt_off00010479.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 16792 bytes
font_02_sfnt_off00011c8b.bin
2860d1012708b52dbff4df05dc6359dd6a83265eb7d10965aa5c60d4d10d925b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8B 18212 bytes