Malicious PDF — malware analysis report

Static analysis result for SHA-256 6568bcb22364128f…

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 08:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e6b3096c6f08a19521820c835e6bd2a1 SHA-1: 7a8d4cb5565300855c3dbe9309bf4f5443b90aea SHA-256: 6568bcb22364128f99dfd11607b2c4b7530670d59ddf342abbb3bb2e72316170
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://synerhu.ru/uplcv?utm_term=world%27s+first+space+shuttle PDF link annotation
    • https://alirezamirmohammadi.com/images/upload/files/82575123903.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6039de3f---6385990318.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/14164427554.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/0d3d7828829e825c96a890fd716c9c5e/podataxozuluzewidu.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/latepixa.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/479be061fb70b29dbbd497782dbd817e/munexukawiduj.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b581fc6f8cc65a10f22206a1de17863a/69218822404.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad276fcb5da---77574887395.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/72fab89447ec6913d91f4a2dab5a6cda/wabajadagun.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/bfe6737943c10674a03a45a68253cf7b/nizaze.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0aa9b5009---mojijagapovowamiritane.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/48654943964.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070d1c960467---23295401304.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/29069752042.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160807838a6475---11925030725.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbadda9e433---gogupujodanane.pdfIn PDF document text
    • http://cuatudongsaigon.net/uploads/files/79872960560.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/2199nn4u6io9a85pgs7i6pav50/wopekurexotapapudakelux.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/31771916274.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/mifow.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/e0a9ae7d3e7db6c91b51cce5851399c3/35987984959.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/vatogidedopajolotarutewup.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9da5b93387---favoguvujeja.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/11689432278.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b9ae290f1---jarovow.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/99788915836.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_off0000f630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 10740 bytes
SHA-256: ebceabe845a83b690c17c9c5b575520f2ef062715ef857ae51eb5982994c21de
font_02_sfnt_off00012721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12721 16592 bytes
SHA-256: 56bd759f79745839bbe357bf3347e1f63359a329ad51286d193759ef074c7af1

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