Malicious PDF — malware analysis report

Static analysis result for SHA-256 700030b30d87e783…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 02:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a5633c3fe795d3e03fb6167e5310f0d1 SHA-1: e7212f431f68c28d57a72453d66f1b82eb849422 SHA-256: 700030b30d87e783dcf91ee62e2812ab8647b137b6c8fcf8f9bdc96ad25c6a9c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://anfauglir.com/images/file/dofuxudenimo.pdf In PDF document text
    • http://bet-balance.com/userfiles/file/75975146926.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/pegivupagoxasegomot.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/052cefab423c1accce18f15a35426f7a/tetowirujobopelegigotu.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/kakerirujuleso.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/19273864016.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607290105cea0---28327534137.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608581a88bdf6---pozaw.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/fuxigewixenimowu.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/11914153c39cb271dae49ae68aa7fe4e/josewupiruguvobubizuve.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/xigul.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/48292866848.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c1e6ba40a---welumekujafutabu.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/zijafipopovewiruwu.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/xovusurudusizilurubewogod.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccde94b66e---bedekum.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/82090869877.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/77777656378.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/foxafuxurozunutuvabex.pdfIn PDF document text
    • http://netflor.pl/upload/File/dajipifawiguriru.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/fulites.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/1f1e7c1091515a6e3967b10ce907115d/19966559376.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/waratagijupowipudoziv.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/48140b2957dcb3434b04ee95f313824e/sivafedaxikapevun.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b8bcae31bd---xefubuvevon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+consolidate+data+from+multiple+worksheets+in+excel+2016PDF 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_off0000e29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29A 11720 bytes
SHA-256: 236946b01e58696acb72f47cf5df71a2ed9dd947afdbd9c48d41a534cf133c41
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 17068 bytes
SHA-256: bb172b4654d3ca07bdd7710e8a31e39a2d550d392709d775a644ee8892de2383
font_02_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1