Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22d1edd8f4d2d08…

MALICIOUS

PDF

76.3 KB Created: 2021-08-15 18:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d9c494233a96381091103ae09d772695 SHA-1: 04c32631cd12cd96b75212d4dacf056cbdc1df49 SHA-256: e22d1edd8f4d2d0882b61234852849e618dc6459925acc61d500eabe60f46447
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to websites, many of which appear to be compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a link farm designed to obscure the final destination and leverage potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6663

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://huntic.ru/uplcv?utm_term=worship+songs+about+friendship PDF link annotation
    • http://huucodatlanh.com/userfiles/file/zugaladabezifore.pdfIn PDF document text
    • http://navigator-33.ru/media/file/83172704967.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/b9dab926bb71e1fad94f92351fcd2f6d/8946318464.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ff887aea---tesusamurubawoleb.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/ruvalo.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d607f2c615---xibowofezu.pdfIn PDF document text
    • https://educhina.mn/editor/files/77139633754.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/kutezemojoxu.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ikiv4lgkp13kuokvavbvpfcaou/67259202403.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/af22daba4433852af04019525aea7c17/dozezamirinope.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/momipaluziladigelapoje.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/raxelumudajenijamurusi.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/73300728175.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/sinadugukuzewugefotedud.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/801c6b66acf9f9dd40093afbc4ab6d63/keriluk.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608011e144a46---xulunotuparidumasariziwaj.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/9a0973da826f36704be6105d00ba4bfe/kipemam.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/46261865431.pdfIn PDF document text
    • http://rurisnet.org/images/file/pejorixakogifar.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/77393366487.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/padobepituduragitapajud.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16097c6781eeb7---1772305953.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 10964 bytes
SHA-256: 9462c82272f9167e3b3d70646c7101faa37e623a70f98dd5a0af48613869c621
font_01_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B07 16824 bytes
SHA-256: eb799a5380aa8fb8aae68b3df525ee6a7765c75c601cc1e6c860d0f18f5f1e13

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