Malicious PDF — malware analysis report

Static analysis result for SHA-256 334e33c888e7345f…

MALICIOUS

PDF

68.3 KB Created: 2021-09-11 01:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: ace5bd7c45dd14dc0668c1ff75ef77cb SHA-1: a825182fcaa995d80e35f4e947f10484caae4b56 SHA-256: 334e33c888e7345fcb941ad041f4fe7a942066717156ef8725ff0164a737c58c
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pistant.ru/uplcv?utm_term=angela+2+hack PDF link annotation
    • http://fmmvn.net/userfiles/files/81630262248.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b6268139---pumuduboje.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/20551736223.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/rebore.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/80841580675.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef47d86afd---94038602431.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/062134258799.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/18250590002.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/74405582523.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/345352224471c8bb3ad637366714ef91/22422200396.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/69115123532.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/xijinebumefuralip.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3ef1bcc99---3479090782.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/51262693253.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/15699784572.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/5749389911.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/lotaj.pdfIn PDF document text
    • http://hkwwta.org/userfiles/89837966832.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b903337320---gejajo.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/poruvew.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613718a769b3b---7188597533.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/1843610829.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363199811f7---toliboseniteso.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/62270101175.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_off0000b12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93C 14488 bytes
SHA-256: 4b8142d61dcd392a3da5f551b2fb241007a27f4753f25ab19fd7c968255e428f
font_02_sfnt_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 10124 bytes
SHA-256: 8cf04c8335d593d6763fbb0fab54c59429fb935074e4d6b3b4b236b918d3ea5e