Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e49046753eaa74…

MALICIOUS

PDF

97.8 KB Created: 2021-09-04 13:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a5f1e333fcac4ccf243dd03521f6e7e2 SHA-1: 63472ded26f78c48051792ddd297be470d0bccd0 SHA-256: d7e49046753eaa74fa1973fcdd6af61dc8fbc482fb1573a04f21ccb7ec1593a2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites or are structured as link farms on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious sites for phishing or further exploitation. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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 http://soldearenales.com/galeria/files/dagobupebuk.pdf In PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/87cf9ca897033630427c052e2c38aaea/tebudexezer.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/054301ac3eb63fd9b6f3d488aaa4b58f/64432731968.pdfIn PDF document text
    • https://baptistfriends.org/media/1890640412.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0pfl4q2su2eenr2ke4ph77vo76/tusadixupedodegeragi.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/26196318446.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a39ter6vh245f9odccpcob68i3/521158456.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/lakuxineremizabafemavig.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/zevojeru.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/20253163407.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/judoferovafa.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d424025d7e---51067008033.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a862a9befdc---53476513587.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/5353181641.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f01c5d6c7b---7116996689.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091b5c897a85---56501362163.pdfIn PDF document text
    • http://lex.tj/img/file/16477612301.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/2f3705e27c8a8a3fce448a3d387c013d/sotexadamogobuxip.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/banunosimis.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/58578844330.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f1fe0a138---22799255600.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/80177560322.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/rimiguvevipexuxi.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/guginugazed.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210801145919.pdfIn PDF document text
    • https://digicpictures.com/downloads/16823298687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=2008+dodge+charger+repair+manual+pdf+freePDF link annotation
    • 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_off000116dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DC 11256 bytes
SHA-256: f10140d86727784127d0e47a675a4c5bde752edef0e414aaafe5af68cca52ea1
font_01_sfnt_off000130d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E9 18660 bytes
SHA-256: d87662d3a117c9c127bf625ff48aeefa63a3d85195329824a2a51e64ab0cf0fa