Malicious PDF — malware analysis report

Static analysis result for SHA-256 54edd9f67508201a…

MALICIOUS

PDF

73.5 KB Created: 2021-08-16 13:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b36b4efb142f40a48f901613eaaffb96 SHA-1: 9d1e0b91be48d1b71dfbf071937fa0f5db811003 SHA-256: 54edd9f67508201ad67a645ae6ab05391d1798132f625c5485d84e2ea8f832e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external URIs and link farms, many pointing to compromised WordPress upload directories, suggesting it's used to distribute further malware or redirect users to phishing sites. The presence of embedded JavaScript, though not fully analyzed here, likely contributes to the malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8615

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=jurassic+park+3+movie+download+in+hindi+filmyzilla PDF link annotation
    • http://tscyw.net/userfiles/file/20210714090332_l13eng.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c516d83530f---76813276817.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c249f16b0---fifosi.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a288fe8488---gojulif.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ggps2qvvvvg629s198csmmdfp7/vanifevikefivetasip.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7d2c7421f---ligewopexomiwofox.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/22391471744.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/gexoziretob.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/lqs1r3g82vi97krd982tkn6994/30456603000.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/zesuvararut.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/28478232106.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905d0143a1b---sutakufadejavosexusuko.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/mebobomugigomusow.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/94992736455.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/1nerj8ms3prtrkqjl7vfjjrar7/1365532023.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807d02b1fba---31166721687.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdba49a72a2---subuxoxa.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/mobede.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/kixunopagekejokuxe.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/h2tvtl2c7m8o7ccksmdol0fec6/tixobidikidosupuralezomi.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/29856993902.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/cde8d44087626642cc50bdc4a6f17164/50409255521.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/hdklngukrefmubgig3oqdgbh72/48378173740.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/japaje.pdfIn PDF document text
    • http://americusfelderfamily.com/clients/0/0c/0c5e5e27a4da9db51eb23c24aa0fa274/File/23464159886.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_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 17064 bytes
SHA-256: 1502c38c5fdc8e72d3b8b691fb3fb211243a7d8a0f58a216f29ba8b930f0929d
font_01_sfnt_off00010d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 11468 bytes
SHA-256: 48401baff1bf04fc00943f85db28e6059a7c5ebd868496d514d0f69440ba710d