Malicious PDF — malware analysis report

Static analysis result for SHA-256 470dc7af3878179f…

MALICIOUS

PDF

194.1 KB Created: 2021-07-25 01:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9266e760c5709b8caa9e6457f9f43058 SHA-1: 72f696864e02ca2282254a3b9a4239b42d4b8e1b SHA-256: 470dc7af3878179f047a39318392db10ee254a4a51a2f5ece6a2bab7a599f2e8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to obscure the ultimate destination or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609735e3e5e28---legofapigatepupab.pdf In PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/lulijelavezedaguzomi.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ceada4a7d1de829726fcb284a4083c5a/10401030668.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bc19d69f70d---wigalupowidumefalinetagon.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/88734648018.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/edfcdba865a565929c336752b731108a/wivitikojasadapa.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b88758c80b7e11e968b527b4bb70878f/nafujeja.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/aed6ff92e779a38157be258cfc789183/75569243881.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e36a55f39---denisegiwuwunelodunili.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/8805356820.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b2f565f85---bomados.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/22036484153.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/ziwiturewivovumetaxosuxag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091283063159---33742429147.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaf2c2b4b5---felitevibawuvupaxivetoka.pdfIn PDF document text
    • http://bociany.sk/media/file/berogewur.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/bigutelasurapinolajad.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607402d594a29---6878161262.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/40517797560.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f636ebf367---19980497125.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d7bd8d89---25142099972.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/fuxisenoxolixuputaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=principles+of+colloid+and+surface+chemistry+revised+and+expandedPDF 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_off000297f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x297F7 11268 bytes
SHA-256: fd77e24bd7768a1500d2df30a7cacee23e196d0f665faf577980e09005dd2ca7
font_01_sfnt_off0002b243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA55 17976 bytes
SHA-256: 3f14ae554fbc200210d879747acfc1f311bfffbe573b03e35ed5224a7297adae

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