Malicious PDF — malware analysis report

Static analysis result for SHA-256 952566d7a954742d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 05:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c6b3cd382726edad70b435c61eb97e40 SHA-1: a9da7bf068a1b3a6b1dd826b1c5d33620376bdaf SHA-256: 952566d7a954742dac3a27908b8f2e773fe1db279dfda9e76a9a4aae7a02f4a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64720003df---87153820246.pdf In PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/subukovij.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/96559547970.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e7e2f90446---gufegad.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/5d1eb08fe0c20e1a55fe0635171418e4/savulolowenowebuviredojiw.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610fe2bf6b53d---25900819848.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec82bb50c0---12900005692.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/pijidusuzilawoloruna.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/fudevopusugaxe.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/tivixofexozareliw.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/kibexewasogubujir.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da062a2458---64263206510.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/vomavasala.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/wudimurebulenujuneviguko.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/bac09037f31ad0d6293d9abbb180914e/zulilupekiz.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/37604606347.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2373b88e8---pukoxa.pdfIn PDF document text
    • http://successalpha.team/upload/files/16238533303.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/41161570827.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1611c4dfd82477---24057804437.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/xipojegasezigiwe.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/57930640260.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160728a1d98e2f---18732243313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cara+mengubah+dokumen+word+ke+pdf+di+laptopPDF 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_off0000dc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 11224 bytes
SHA-256: 3f234baeef5a0cf1f10b9bd3da6f509ac74d3cfc8277fb3f6b94eae4d33733ca
font_02_sfnt_off00010e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 17228 bytes
SHA-256: 9976890938b28f72c7a139afb4880147a9cb18645c244db6b8b3a3995de143e4

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