Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8d1cd5cea17d9f…

MALICIOUS

PDF

200.7 KB Created: 2021-07-03 08:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca452e8994364b81b6a3d29e94d553b0 SHA-1: ec2a2cb5989bf3063571c4dcc029e5bcc2f9bf3d SHA-256: 0f8d1cd5cea17d9f91e0037f28d0ef67287b9553930690fc288942b780dd441e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories and other suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely leveraging embedded JavaScript to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9741

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=how+old+was+joseph+jesus+father+when+he+died
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/a0a76039d96bbd1fdb4699563aa3869c/32057896701.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3739a8645---90700499498.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb32d9d93---kewobodirojimude.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ae249757d---wedebekubefapasubosaj.pdf
    • https://kham.vn/userfiles/file/menoxonemuzafakor.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088c506f3e53---rupesufisewugi.pdf
    • https://olivier-daulte.com/ckfinder/userfiles/files/kubepefixa.pdf
    • http://www.edgartownschool.org/uploads/files/kulat.pdf
    • https://myparrotfood.com/user_files/files/fapiramefexeki.pdf
    • http://bestorkate.com/uploads/ckeditor/files/vegunujoxemerovetutokipir.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/56f0e03f01e7d234b132d5582609399f/bafoxodilugixowofokat.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0a4657eff352200ccd1347c5317e2b15/32121953593.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a80de638e08---80559909155.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160982020ec379---72587246911.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7df7956d7---tojexomizer.pdf
    • http://smflow.in/admin/uploads/file/fewajikozafifunewixez.pdf
    • http://erdivigado.hu/userkepek/file/60632340320.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb57802aced---5774865921.pdf
    • http://narnivet.com/userfiles/files/97489695911.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qpe375ta2n7h6956cr4d1k6h9u/tidipipavukuwawixe.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/0shqf3tkco52v5dthnvcr0j62t/duxakejurufijapasori.pdf
    • http://yuhongzg.com/d/files/wituzoduwisoluponi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000294eb.bin
eed41b1f5ab634ebef300779d3062d281587f412bbb146e52f23a6537550589e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x294EB 22236 bytes
font_01_sfnt_off0002cb71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB71 16792 bytes
font_02_sfnt_off0002e388.bin
8728fe7cc2164dd8b831f391a5751abef0c63f6e2dbddc562111b42c7ce427a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E388 10900 bytes
font_03_sfnt_off0002fca3.bin
ff68716322524b672498e7e1aa97fe0a5ec11b2b637ef013097ef36ee39f4243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCA3 16632 bytes

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