Malicious PDF — malware analysis report

Static analysis result for SHA-256 208bb8fe40c18490…

MALICIOUS

PDF

83.5 KB Created: 2021-08-19 12:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: ffa349391608ce2f49dc185d04cc147f SHA-1: e27aa4020c3287a8265721e72ea516c7211a81bc SHA-256: 208bb8fe40c184904eb4a214f29f34700f5fae0bc846d0a3186486ccaeb46bae
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised WordPress installations or disposable domains. The primary purpose appears to be to distribute phishing content or further malware payloads through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drafthe.ru/uplcv?utm_term=how+much+does+walmart+machine+pay+for+phones PDF link annotation
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc235ad19---zepololapasuta.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/bn4sbd4oohh4uiki0scd9eu16r/69622425339.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bb68cf47b---60472655303.pdfIn PDF document text
    • http://hydrem.ru/images/file/37268200199.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/32e9b614bfd479f59fb30633ac83b3af/borikufasikenuxofipow.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1611aef65c8347---32493120754.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/75a2eabc14c888bca338007f67f5df2d/lonevuradesi.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70ebbc6ac5---98385741624.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160be7362c1cb5---kagetazukoruvidufeke.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/07/files/210728041903.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/82480057610.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/dlsjf0f13s5u0u3g56fltkc9j3/16678052479.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/0cff9af2f26ed50c9f2c57cedfe09e74/22396852504.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/komalawofugixujojigobalis.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/jiziluredevu.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210802133622.pdfIn PDF document text
    • http://cokhisah.com/webroot/img/files/36521964413.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/44028980369.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/wusalonuzax.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160703876ac8b6---93373296794.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/tatejojot.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/77342320004.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bibibukufolav.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_off0000ddc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 17644 bytes
SHA-256: 846f7ed8f97b128d7d7dd23bb865996527f21b3eeff7828b1daffcef3593dd11
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12460 11176 bytes
SHA-256: fc658fa36f94e728bf7aef14a38d8b5f56f3b71a59bd8dab683b1dcc0da2c948

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