Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0179c124576856…

MALICIOUS

PDF

106.9 KB Created: 2021-08-22 11:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32a23f3cd5f4b3d987f0f0dd6c928980 SHA-1: f30148be078b45becac73048d1b361a976386eaa SHA-256: 6d0179c124576856ce376347d942fd0bc1df36d5545b3af5a355c022e6379f34
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://crewmak.ru/uplcv?utm_term=substance+definition+bible PDF link annotation
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/86cf88b3d6901aa55f4bdcc16e46f360/76209877129.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/48010757389.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/u46no9tip0rds9c2gh1fnnckod/31504817231.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/1b654b23e6f88f351695a619e95f7aac/64129157067.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e518f494ae---55937148508.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/abb8b2bfea05b1e55562772c4f015406/zamogu.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/68359912236.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819d315a242---laladumuvudubi.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dujelov.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607544f7d96d4---47854115230.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff288bf5e---42606297896.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/timowos.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/46d9fefc6e6f116aa9ca68a61faef741/falezamemudo.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/74233476368.pdfIn PDF document text
    • http://deauville.ru/files/file/51287140368.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/rikukegufukuxabudanu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea109557ba---serejojonufowusufezaz.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/a299ffo211mgto3n0p34385led/64412348910.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/doretepamokofid.pdfIn PDF document text
    • https://limmaginebistrot.com/file/86518515055.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/44848199795.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608159c010968---62539674490.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A69 19232 bytes
SHA-256: 85aeba42ba7221f07fa788124c26f66f6f2f20f2eddfca29fc6d25c55b664cd4
font_02_sfnt_off00014ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE0 10684 bytes
SHA-256: f097fda7929745b3b35c6ded89365e8387e5358f0abc89a2b4584e8a862b268a
font_03_sfnt_off0001637d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637D 22772 bytes
SHA-256: 3981e77cc9ce22a0bdcfe677a3254c76e908e73caee1ba94e5fc808fdc12cb66

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