Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd02e2fdeca8d392…

MALICIOUS

PDF

88.4 KB Created: 2021-07-14 04:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3c27af003f310311705288f2fcc56929 SHA-1: 47b98b9d74ee8c06a70713a13d758e932919ff34 SHA-256: cd02e2fdeca8d392cae73020731997c9e04500bb8c9c4451cd7a3d9ac3ce2fa3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting PDF files. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d764fd4d9ba---pixasupumumup.pdf In PDF document text
    • https://zivotzaokny.eu/res/file/dojam.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a48c60d5c6---fawajolegimukifareviroluf.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/xesesatijinafusutuwokikax.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a0f647e5d---bazufesof.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14248e247f---rovip.pdfIn PDF document text
    • http://vhktn.at/images/content/files/bunazaji.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/96512205396.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/gemezukebureboxidopo.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/91247946510.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/xuruwoxipipuwademevajosob.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4e725d158---28425895464.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf56a819d---8361102029.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/5talm3r8m4o0odq2vdklfjejld/naforatutojimenog.pdfIn PDF document text
    • http://computerdoki.hu/user/file/fubutoxulonal.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160817bc2a638f---gawosilisefalekugan.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/4fd2948b0838de81d878db4f0e518b14/mireruzepojitazo.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/03faf3911d46ca30532b4ad8321cd1c2/niputuziborujazuduv.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607005b307aba---81348404077.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c8672b1f2---34312929247.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/20509747306.pdfIn PDF document text
    • https://haidangpc.com/contents/files/gupivavotepuxune.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/57346845800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=360+divided+by+6PDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f48bf56610---kexiputijef.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_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 10128 bytes
SHA-256: fb78d0a6105b57d86b545ff78c9cab1940e715213adec405d2d2d25773f979b1
font_01_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001227d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227D 18652 bytes
SHA-256: d52320c5effc5d2e384f4d44328756a1c1c8af2b91f829db436d10fec5bc9140

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