Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a085151e399342…

MALICIOUS

PDF

82.4 KB Created: 2021-09-02 15:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fd0beeb4d592a5b41009af6b3d61742d SHA-1: 779bfca4e239f30e0a16389a84e0a83b611e2fc8 SHA-256: d5a085151e399342e2cad6d47823fb4682e9ba31865696f6c83a33c0433f1834
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a tactic to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The document body is unreadable, but the heuristics and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0d16cb0df---89277038861.pdf In PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7db657cc4---15643918725.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/folurofudexufuju.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/5e42061573ab2a06611639e398d5d190/92322504500.pdfIn PDF document text
    • http://yuqiaohome.com/uploads//files/202107301355359668.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/75210475760.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/58759738270.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/megefixikegakovijizobi.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/64eee985a288c6c0b594a4f4628d40ef/fisuvotazixagazuxaje.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084785431b5c---60930580891.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-9/20210609194703700053.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/pakojipabozuximitowevoxux.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/96307351983.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///dazofixiwanizidosokemiko.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/eafb9af6170aa4b1ef497a7ae6b44dce/debugerakojetafimuzaxijel.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/xumifimirimaket.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/malasozut.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/zivitodati.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/pazumegumoditadamipetuxa.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160875e5213c6d---zupolodod.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/gvog2frlklh216ugf0h7qjgk2m/niwifizumobubeb.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b33813c7c---84944646691.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/99ac4bdde030314281a1f8816efb708b/46048210135.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921b7ac4082---fubejivodoxigu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c2ac00cda2e8bfd8438b7179de2fc22d/surin.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/forupofonadalo.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612477b02ab84---30622041517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=offshore+electrical+engineering+pdfPDF 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_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 10924 bytes
SHA-256: 9d88c568a67d3f7c448f1c2b411beb5b4dc9abbe429f0ba985f1bb675ac7fffe
font_01_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 18308 bytes
SHA-256: 7c10836000da0d86f7c4ac36c9c99a72ff52908a984a4b9dcab292b9a9e57615

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