Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadc9ae7ff7a894c…

MALICIOUS

PDF

90.9 KB Created: 2021-09-01 03:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bbe254e87505c1a36115f1402ebf1590 SHA-1: e82e8512c13ddbec2ac77b64a31a8bc6b86cc9e0 SHA-256: fadc9ae7ff7a894c3f1e9d3224918d7db88f3b94c9ed23be12de3dcd81236885
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://hytechplus.com/userfiles/file/tamiruguxiwupamerek.pdf In PDF document text
    • http://glovimex.com/uploads/ckfinder/files/18616363680.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/14615826769.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/97288ab672eb43efd09dacafef682166/navoranilawozinuf.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1d9677588---46578096726.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/nuvovewoweropiremuwuto.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/vuvazotited.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/56590809103.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f922d9db6b---lizebexowirumifaku.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2ciim0q0l3b487m7bmu6m42i67/7311146352.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/jf3ei4es6dnpqhtj3in0j2cjq0/26378099641.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/40958977015.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/ririkugurinevigop.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/02a4231909cb51517fab37134db6a6d8/kololu.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/puwar.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5103ce89eb130bd8f109f65fd57ef47/baxetovigobena.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606de27374983---43974579677.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b54d2059a9---73501802392.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/wokifeviri.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/897fc64f9ca5be74632e80a681be2d8e/23890531155.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/5119272973.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d514e2b60d7---26769113273.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/39109468656.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/84452274511.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/de663424267c58d043e6a0dd1233e14d/53739033961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=south+african+biomes+pdfPDF 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_off0000fede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 11152 bytes
SHA-256: b71e75e9673860a8e44286d86c1527d61db34e8d32db1c2672b00e72e53fba8a
font_01_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001309e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309E 17128 bytes
SHA-256: f41977c7af20e9de0f162941aec63ee954697c92d4d8f2993ee535e75d77bc68

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