Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32ed06bd372b56a…

MALICIOUS

PDF

84.5 KB Created: 2021-06-28 00:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b82698020a8e2177ac9cbf6fa14c675 SHA-1: 66193bec1040d01000d29d396c3933759c3cee9d SHA-256: f32ed06bd372b56a89a0d09bc36b0ae5d63d0df9daee9f84a01ea9cf714bf0a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/gk0bj0d98q2pdmv8c28atbq1qq/koresusalokajegukefe.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c59bc359fd2---44543028794.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f75576ca3---xitopopolaxurufit.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607327510c912---12368731997.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b18fd9a71bb---19582836020.pdf
    • http://capri.lt/userfiles/files/tunuvedobewagunifapeloda.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/vbope5tnnp0rr7pqui0dr14j74/xurutunuxisibewafev.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac7db33018---45894227090.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90092d1bbd---tumiresexewer.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608534e367d69---bepotoweperit.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b0297b2665166ed443e77bb49271eba7/45318251992.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/73bf1b90f57e655596dd1da17c4c99e3/papoketusidolunarepabik.pdf
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/60847478161.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/dd12057414e02817129979db5ffcf107/soruxizelofut.pdf
    • http://reelproductionshd.com/userfiles/file/93003575337.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607949a6d33cf---85351609486.pdf
    • https://incoyun.com/calisma2/files/uploads/zalibomixakulawafiloveba.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/ruruxojo.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/32a76793eee2d704f2a6f3a14322ef10/kozutujori.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54a5a6419---63031655618.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25d42feb0---39816886810.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/dipv7uok5753d7rm8l4a7vebm2/pafizudapijaz.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/c3tgg8r3k3so9dp2qjn1guatvn/guzitelirebixusowakib.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=yoga+for+gastric+and+acidity
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ce.bin
3d905e094ae1bc98085a5170a28ad3bba0a2c2acf1be4d789e21d14fc20fc1a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 16904 bytes
font_01_sfnt_off000114e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114E0 16792 bytes
font_02_sfnt_off00012cf7.bin
7dede70b034ddb0ddd26b49e7196fb06e5482707d6a8f4577ef9567853fe041c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 10568 bytes

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