Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6647030329e3b3a…

MALICIOUS

PDF

70.9 KB Created: 2021-07-16 10:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 10d33b1daed23287622176e46256cf2e SHA-1: fd7dba3990606f37689ea3db7c0140a6917a1513 SHA-256: d6647030329e3b3a5e3d9b7572235393cd191e73bb3a8baa159c1633e183083f
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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://pixomot.ru/uplcv?utm_term=big+endian+and+little+indian PDF link annotation
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738269b9a63---42285749224.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/86615899623.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f472c97e13---89343581151.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/693qiu0nqo989b1bq8d69hoss4/sixosemejilutirinogeg.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210709_4974ABABF12F9105.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ee26733a2f00708b56dc0f5e2217b86c/koroxovixapodibafafegizes.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/98115130d1f04e12f46638adcbd1f5b9/kivawukozorobem.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/1f181be3668633e0523c5a473e1785e0/disisuzi.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0cddb6b24---xolonemezejelir.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/dalidemefomonogezasit.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84a220140---jebojikavulubevaninogewi.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/r88etri3eevjqe9q36qg38p2mv/kiduperenub.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/22758127368.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a61ddcb7701---86868071023.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a950624d6---voxavadalowobosojejo.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160906501c0ed2---5883981557.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/vezavujexabifuwatulubige.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/geuidqvpjh01ood87f1qsjtr11/bilezexolugujarofemol.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/talakenisuxix.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/riweb.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a5e2e2fc832242e809a4b6d275aa6833/pijipebelonivepu.pdfIn PDF document text
    • http://come2menorca.com/images/file/42383490711.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d7046f50461---jumufigejegusezulalozo.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_off0000b54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54E 16356 bytes
SHA-256: 350fe33adda3c72fd13775878cbba14a355b607a9c6d12e55b33304b8669c638
font_01_sfnt_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 10088 bytes
SHA-256: c116ed0e3d6f6382d9c185ffe16102217633974c97d4a975455d528dd30edf2f
font_02_sfnt_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1