Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6737ee2e7eaa2d3…

MALICIOUS

PDF

126.4 KB Created: 2021-07-04 12:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 428de1609f789b7b2be264fe0ce9489e SHA-1: f0af34760ef0fd4d03d260552cbee75ef77e6d0f SHA-256: f6737ee2e7eaa2d3bd31a9c369963e56ee8cc74bd800bedaf534295eadd2d624
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories. This suggests the document is designed to act as a link farm, potentially leading users to phishing sites or further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.aadhar-interior.com/userfiles/file/zopumojubade.pdf In PDF document text
    • http://amandatravel.com/userfiles/file/kixixu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6285022ed0d47c1e05e05bc0e7bd0f5c/simafofowo.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/047bb60db3bd427f02f61b8e1bf86037/retifoni.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210625051702_fn4h55.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077f790e18f3---rivasudalamatov.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/37096dfcf4f3eb0afff12e66abaaeb9c/44065069971.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/o9dtrksg6mt4d0pjjh76t63q81/wikewoxojazafon.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/f2iu7i00b0sig42l61v1jid02l/21096621302.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0871d40a3---dojerene.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/e7320239fcf37369afe3c689e287e9ad/86223297591.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d970cff49851b1ea2fdb8c83353ebab0/kukaruli.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fb91218cd---semedokilulukotorugaxe.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c654b006ef---kitibobigoramusizow.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/a536350f28e95831d9b9dc9d35966603/nikuxeg.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abbc010ec13---44234078718.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160be7bf20c662---88658225181.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/05fe22c4b0fd3a09d70268ec658e6bdb/pulimonuf.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf2bd2e3f---70960509174.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/65e6p630i1728i5e7cj49arej3/97667019525.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607861c1199d8---rasefagatunerelagiseji.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/180524704360d46d1cc9053.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/89044368281.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=historical+method+and+historiographyPDF 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_off00018bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3F3 11064 bytes
SHA-256: 46dab2a37517386857d44d162bff32cec828910b24cc79aaef54f0d70c30329f
font_02_sfnt_off0001bd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD50 17892 bytes
SHA-256: 0000c76b479b588d99f87e8e3a1c7b43e7b89c17fddd3396e2c4ab545118f83f