Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bbb49e83457fe0…

MALICIOUS

PDF

68.7 KB Created: 2021-09-08 03:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5dad2d9e40605b76f21c00f0b6dac11f SHA-1: 5fd0f210857ce4e82426801031d7e949e5aa90f7 SHA-256: 34bbb49e83457fe063597e4d838008a6f24a27f5cf8c1adec79cec7385e3f0c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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
  • 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://irlanc.ru/uplcv?utm_term=kenwood+dmx7706s+manual PDF link annotation
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/c92110a04e3691c54251f5f6554dbcc5/kudoburasubanoxorozudu.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/66477f520070b3dfbacb7fb5ab5b4459/miziginesobugox.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160edfb292d0c5---dexav.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/39736769406.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/lulajudezosolu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4b4456a7b---situfemizukalevevedakotot.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/3577341948.pdfIn PDF document text
    • http://maymaygiaydachidang.com/upload/files/vuvoxisowimoziketa.pdfIn PDF document text
    • http://seeandhearbetter.ie/img/shop//contents/35879484386.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/94598495751.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/ginaxorizemisax.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071cdb9bf663---vaduzesatofa.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16104a446ba1c5---gidepuxabevigalijitemanuw.pdfIn PDF document text
    • http://cwesp.biz/upload/file/nelewefigixuvexalujojako.pdfIn PDF document text
    • http://gerocuki.hu/user/file/21539816439.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210828_110008.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/mujevuzawinedir.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b895340098ef6e6cc67d006b53af9396/98698105034.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/61647093462.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a384e215ee9---pefoxepawop.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/posezebegoxomu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6ea60302d75eb7474b38417985e25200/33587533836.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000aea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BE 10736 bytes
SHA-256: 3f6c2c97c62f305d42e6c992fb7f90d86b4f45b1c45f06d6d2f7a645269b0b32
font_02_sfnt_off0000df8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8E 14940 bytes
SHA-256: f5d6a86e586b04d67b552e04e5c585bb2a81019a8ab75be6ff9861c37b01e25f

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