Malicious PDF — malware analysis report

Static analysis result for SHA-256 216efa2c1d8704d7…

MALICIOUS

PDF

91.3 KB Created: 2021-09-03 09:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b8a8a36fb52bf684ce0b25f0b73ee79b SHA-1: 72bfbce40c1bfefa6aa678c6bbc03804865be333 SHA-256: 216efa2c1d8704d73b813c0477749d5cac04ec5d276c1fc279fdd7c0e312059b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://wastran.ru/uplcv?utm_term=semantics+linguistics+pdf PDF link annotation
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612553f992253---95449924617.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833afadc579---getozapexow.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607651a8e2192---sokilukipoxumetul.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/gadipuvibodavasikutufurij.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072181655c59---liwadedezigadokuru.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/puwanekokakimopibutonute.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/puzukala.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/13957195360.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/34461983054.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/jugonivoselumuzet.pdfIn PDF document text
    • http://rc-modeller.se/images/file///1290052288.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d2141473238---56433030390.pdfIn PDF document text
    • https://faprosid.com/file/89256601109.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/mumiramikonopewojuvaxigor.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e61c01a90ec---telawuwazokadozagomow.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ug9gqai9f67tj3dt3f9vup5tb0/lorufotezalakuxeja.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610805f0f000a---9868046446.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/u8ocv3a4asj65ajkeua5cp0cml/11334406252.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e56c04d67---94960547689.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce3e79e70---govavikuzujigojebevaminen.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/zigexejuzuv.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210618_FEB26013CE3ED18F.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd3f45920d---sibirulejivemebufamitezex.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/vqfq92sd1maegp06sd4ql45ntv/kidinorejeturepagun.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_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 10916 bytes
SHA-256: 098e27355f5a267db28c580cbc6333fe9aa7f12da4b0b0e9fc239042aff2f5b1
font_01_sfnt_off00010ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 21432 bytes
SHA-256: ae4f8776d2b24f00770be7cfa89ebc8e6377915b390eea37d8123d85c94c0d99

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