Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e63b488685e82d2…

MALICIOUS

PDF

88.9 KB Created: 2021-07-31 06:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d486d2aaab14577394f6c314b2734a31 SHA-1: d73991b008d99df8b8f27caf56f9ff30196b6486 SHA-256: 3e63b488685e82d283004e2d6baef66537b97fe4ad64e2dcfbef29825ced5ed8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised or disposable domains. This behavior is characteristic of a link farm designed to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://asdgolfclubtoscana.com/writable/public/userfiles/file/48849599843.pdf In PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/8b47b38c841d3b7d25ef86ff426dec46/39008274057.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/kibevo.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/sebobuvuvuvonerifik.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/dekove.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/7638926882.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ktjl9mht069826gbdm14khiekg/41161918153.pdfIn PDF document text
    • http://teaandtiarasmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/bogin.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/87925149359.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831b4e62b2c---28144586553.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/gokegukudorere.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f41b808f18---64431755192.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a4247f28---61763163945.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/q4l0vl48uaighh31efj96rt6u4/92714225638.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/6363ebe35504d499d8381432316bb7f7/wobovaxewifokusibudave.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/suldavbe98chc1bkutj22o7fmk/xulovelev.pdfIn PDF document text
    • https://actorconseil.com/files/file/kebazorizad.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb8000a332---fujimiwojufatorokoxobis.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608413692c640---bulumobafenut.pdfIn PDF document text
    • https://bangkoksolarpower.com/syner_upload/images/files/24056216750.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/81712414132.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/4v511pb5qln2e2aaq68fntocs4/kubepivevugolenige.pdfIn PDF document text
    • https://plasy.com/uploads/file/49579749538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=condicional+1+y+2+ejercicios+pdfPDF link annotation
    • 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_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 18216 bytes
SHA-256: 10274d85f84ebefff10a577a5433b26eea2dc4ae838bf30a6a8a4938f401f3dc
font_01_sfnt_off00012182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13999 10960 bytes
SHA-256: fbd8310d6c4b774765c2b996792f5bda4616086222cb930c6640fe3ce9c0277b

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