Malicious PDF — malware analysis report

Static analysis result for SHA-256 9780dcd1c5dc2728…

MALICIOUS

PDF

96.1 KB Created: 2021-09-01 01:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5731e28ce51d3698c2b90af1d9615c92 SHA-1: c219da4121bcdd655b2a59c1ead5cb30f91b751a SHA-256: 9780dcd1c5dc27288239839af9896dfd6c99ece66ca3e5d28e180b4a2773c18e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of numerous external URIs and compromised CMS upload links points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/efpqdq1nl61mksknqhbfqbeqrd/25505699174.pdf In PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/sononotosasakelutav.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/71476498785.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607623244ca80---kugirajizipigekilefa.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/gelonolunuda.pdfIn PDF document text
    • http://mesterek.net/tmp/9397390539.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/4f7455523d3e24c6fd6027c8b0305bee/45774298881.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/66405276369.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a672a3a2cd957729b245bde1406e6f1b/jegusunuzuvaxazijolavosil.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca6278b7ba6---jovazotuponisisudakojusit.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/risasokuxupuv.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106030911337325.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/sjeen613qhnckdlgei1vah1l70/29953074613.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/mapawiju.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608561c6d048c---27316254587.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5b444e7d5---lifovegogorage.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/37656474419.pdfIn PDF document text
    • http://ladakhtripmaker.com/userfiles/files/76459312018.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb8e7b43a7---45171612496.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/91884828927.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/xozatatuvipabonane.pdfIn PDF document text
    • http://www.520amis.com/upload/files/71533364535.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/98362172064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+sell+dino+jurassic+world+evolutionPDF 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_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A07 18016 bytes
SHA-256: 14b9f66a0adcc1abbbf64fe168dcc3e165fecb273c29e09e25eb59ac180ec400
font_02_sfnt_off000158db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158DB 10736 bytes
SHA-256: a36ad03c5874f6d2aeffb3d8c8b536253edf2a982f8f75bf85fedbd4c88ceb71

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