Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b70b1cb646a158…

MALICIOUS

PDF

85.1 KB Created: 2021-06-30 18:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 91ddb0072ca54b53db089fce0daf9d4f SHA-1: 884b76e863cbee540daf2dce21f243a72eb2d872 SHA-256: c0b70b1cb646a15876f9a0f71ae0455581b6b23e243daab1f71fa8d8e18cb298
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://huntic.ru/uplcv?utm_term=causes+of+building+collapse+pdf PDF link annotation
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/a2028aa0a7edbf5f8cdd05b01dc80bf9/tozufaxun.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/21104375105.pdfIn PDF document text
    • http://coffee33.ru/archive/file/75650910116.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/gifuxatewameriluke.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7c2d0d022---pawufuvifugapilene.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e62b742f5---70419839542.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/e4af6d3bc98ef117396d1ce85094eacb/gaxulumakafuwametebof.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/68702827534.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/30803932089.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/6ab4443bec09b37715bee57fe629ed6b/kitejiwirumejenizezaser.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/pipaxomunapor.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/168pgqqvu16blujpnq8gnjc720/pupuxoxuloda.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609daba862ba6---besupaxalovoxuzevawukixo.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/varozenazage.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24a5b6df7e---nemudupokepaguvogeb.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/33815826bbcc8c07ec7aef57cfe13f8f/99830487935.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/2143301088.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/97889471963.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/rixetatekugasigovivulaf.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/nupibala.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942c0f22629---72828668418.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 17080 bytes
SHA-256: dc7f1141e7357af611394b4ce2e04aa0402f639e8588567c5719a5728a923b55
font_02_sfnt_off00012ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECC 10868 bytes
SHA-256: 97bc8f745331321f1d6d25f01078eb4e7fb35521304ca54cf07af61cdc4645f8

Open this report in the interactive analyzer, or submit your own file for analysis.