Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2fe2836caea54f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-17 18:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 10b02191efe67e0ed21f905d7c7b7edf SHA-1: 3ef6e0d9ebab4a861b440630413c3d098f4b64fa SHA-256: ab2fe2836caea54f56045501c77d3e9686dd14fac9df13416b2c8c36e930a2d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of external URI heuristics and link farm patterns further supports the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://garglob.ru/uplcv?utm_term=alight+motion+gratis+apk PDF link annotation
    • http://vinhosnorte.com/images/files/bovilumiralelinexaxugama.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///litol.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/jmv04pui7nbgde149l256r1vdu/bujafatufurotinunosimatit.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613697c4b1cf6---82000987044.pdfIn PDF document text
    • https://mytopics.it/uploads/file/tisozeteduxipezoboret.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/21090201535591321572yi3.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161410fa418e70---rimub.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614047bc7989c---powudarupataneronaviw.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/majefoborebokopit.pdfIn PDF document text
    • http://trieuduong.com/images/Download/nefetavixabikelezikeju.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a44b047c8---98041587288.pdfIn PDF document text
    • http://crediramasrl.it/public/file/zugoxuxabilarumofesulekak.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/74d828aae5fba6567b2d290986d59e4f/vufenamoxisiwixopotalema.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/15172681344.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/49834354066.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/91466075395.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210909085133.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132551bac085---15289429386.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/fusasijiv.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ihik5e5r6lklvk0qkdllik2tg7/bafejofunukuwa.pdfIn PDF document text
    • https://biocoils.com/img/file/49833488703.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/fa24b2f69ab13d6d7832d83fa8b97103/53036592339.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/xosumafexubopen.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/48086411906.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138aec99e3ec---89618616900.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/domit.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/zivasadosoxemidusiguvu.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_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 17308 bytes
SHA-256: ce5b0f17cf907c9eeda7d4dfd0841fc06b39a7490d02cff0caf17b94fb2c41ed
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 10640 bytes
SHA-256: ae9c25932fa7bfc9675a4211a5e787db00e772d0e0a51b6b501973b989dd93e0

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