Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeddd0f7776da51…

MALICIOUS

PDF

85.7 KB Created: 2021-07-10 04:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fb1b754b6f0ea5de34d8d65264e89cdd SHA-1: 73efab6175031482564cd8745f0a42fff982b987 SHA-256: eeeddd0f7776da51ba03f19a9fd145bd4be6ed6c591154aebaf75f3bb432cdfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://laborke.ru/uplcv?utm_term=60+seconds+to+live PDF link annotation
    • http://zzliuxue.com/upfile/file///19447947327.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/kagaropigajejot.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/27742497218.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b678ac0eba6---fodabegubegam.pdfIn PDF document text
    • http://getem.eu/files/file/bulunipomaxaraxomipekaj.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4613441af2---kupulolejawifitigome.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c82f6893becb98945815f43314c02fce/89702167147.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b709a3bc413604b8c30117698f947a0b/bazuvudure.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/8136070422.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a77c25849d5---govunizajuzifozujupo.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085afcca223d---5841604386.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/7a7182bb713a0f98d90ba5e12251614c/kilavemedasi.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607288fbe1ddf---rutozejero.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-19/20210519041100653153.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/91631034900.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/aqbk5tk4fqtu7njsckv7r1hgo8/31907231392.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609e42f51baa4---30519470628.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/logemobovejubip.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/zumelobezogefudamipu.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/82254187923.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/vovupa.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d640d57c85---zadizipasusazozibuguv.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/16546298351.pdfIn PDF document text
    • 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_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 17544 bytes
SHA-256: f6311700480772e6138f2de6e1cf49266840fccb896bc68f53f7fd5726b24e1d
font_01_sfnt_off00011a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321C 10360 bytes
SHA-256: 8925986d6c598c0761f015e4664a2e440d072cb47446474c9c3b5fcab045ec7d

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