Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a68ed62520ed492…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 13:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 18781104162377b77283b44269588281 SHA-1: d64aba73da3ca9df64fce9358b349cb2f1c4b7d0 SHA-256: 8a68ed62520ed4929500963f3bcc9607732311623a8199c868af0d3cb836bd83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/10prrlalfft5s7e9fnckbrk9dn/59803268589.pdf In PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/26449910802.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/parebowofefule.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a8731efcaa379d5d7e6266251a0b01cb/babifobavor.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a352989f3c7---bopelefokabawasew.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/lurolefawogeluberif.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/29148632866.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/72857278353.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/nrloaiibsaj8ujnk78hflmlchu/fewumezakir.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf23de1f45---sojadupanomewuso.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/joludoxidaraz.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/66cf6d9dc93cb0b6db7437d16a498102/razoteraxesafuvolezap.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/xutediweruduxul.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/13033221813.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/tugepepupajizufaf.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/97214059297.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/38234b2b5546dcf8c8482d5e05985462/sugolutokinovowikobokuf.pdfIn PDF document text
    • https://webmenuplus.com/images/file/52203772434.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d919c91e2---ginekobazelivalu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bff77e3f8---77439802998.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e1cb3e0be---42961146850.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/soputejukidenidokeritun.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/019dbaec8252c453a96312cbf881cc87/wujowipukonaxevozasud.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160987a2712cac---legokuvevosefada.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/85037124196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=raya+and+the+last+dragon+watch+online+for+freePDF 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_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 11000 bytes
SHA-256: 01feb320209163aae04c2b234852fa131ca3eacaadced8c3751096b3af0722c8
font_01_sfnt_off00011343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11343 17816 bytes
SHA-256: eb55c27797280a36a33db55cc820bc600621f230473ef178be0e65b401cc48d4
font_02_sfnt_off000141cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1