Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abadac019c75ca0…

MALICIOUS

PDF

90.2 KB Created: 2021-07-19 07:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1ef88719e55972259d0e33204d3d5d7 SHA-1: 8c3975d21674b4849b4948b8dc30fd907e18cf1e SHA-256: 9abadac019c75ca0d76f59037e65855a06d64c56bff838333c74c00c3e85fd89
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/clcic16f8blu6rtlktdh2ou02p/22102512781.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/662993ad2d7ac9ce5f46f4fc70f4b73e/ziwutuxe.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/d6foc0jq747hdhusfqu7qqpmqs/zikulogig.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821664e9256---99126301073.pdf
    • http://goref.ru/files/file/64015287420.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96576504c---dabijerakowujokunuz.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/aad86350029acf330b9498758b8ea031/44460549512.pdf
    • http://aeronautike.com/userfiles/file/29996944601.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086390e3e12d---84730278796.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a528e783bc9---2469911175.pdf
    • http://jiangsutravel.kr/userfiles/files/20210705_184829.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa5f65aed---96510448737.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b18ab2f02---55761314510.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/342671bd2458bef708ebd04f0c9012a1/gumuzu.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1f3ca366f---dikejanilekaxodesepobuter.pdf
    • https://pypconsultores.mx/userfiles/file/59366974392.pdf
    • https://brs.jo/userfiles/files/28646559269.pdf
    • https://cepatdaftargroup2.com/contents//files/walodebufipumanirutimeg.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa3485743b---80358966385.pdf
    • http://0-50.ru/userfiles/file/buvusowoxemanegopexawe.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/650eb4b710cedaad15cdd56c3f4603cc/sanugogokolavilodimitisog.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lo5pho40mfdshv35meslvu1p9j/xatit.pdf
    • http://scouttautomotive.com/editor_uploads/system/files/sasixivesopa.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/7c8168bb9d2cdd21035818eb6706e267/dunebapibuwajafiraret.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072628fc2239---88121784528.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160862ee3a9262---15813687314.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609433a216926---1814663310.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=computerized+auditing+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 16792 bytes
font_01_sfnt_off000111c5.bin
08c0ebe45fa2d653373eceaa78291671958d61a424c435e410724395595fd7c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C5 10816 bytes
font_02_sfnt_off00012a85.bin
099d507ac4dd716eed278d56336d9e90248da32a2d8db580761c0164cdbef297
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A85 18052 bytes