Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ced03c3e95803e…

MALICIOUS

PDF

87.1 KB Created: 2021-08-15 15:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4f1cd169a7adfaf594a215baf1fbdb2e SHA-1: 27c2476ca13360bda2b0786e1e6a465499c76546 SHA-256: d3ced03c3e95803eba0513d05f6fad4f72049cf11157c51720fc5ae3cebd6e14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it's designed to redirect users to malicious content or phishing pages. The presence of embedded URLs and the link farm heuristic indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://queure.ru/uplcv?utm_term=subway+surfers+game+free+download+for+pc+windows+10+apunkagames PDF link annotation
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/n7rck6rei7mhgprf48gttk81t3/53765290412.pdfIn PDF document text
    • https://haidangpc.com/contents/files/numelosituwipevokomoguv.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/44383b8c71a3303018710ca46dd52ce4/63078586939.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/84108424914.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce22b4c1ad---tuwutesimelawit.pdfIn PDF document text
    • https://ebooksweb.net/files/file/sotunojanikifixuwemapu.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d6205ae9ecaabac731ab6d1dc1a2bad6/vebonuz.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/rapdpvbi8cefe0ojqi49jjheo2/596010072.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0cfd5f9e4---pilalapip.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160abcaa9a8d73---nusebuzipos.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/77556187088.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a4064d9595430dbe077d42af39a95e2f/lajiwibiboxoxus.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/jibevuzaxevapan.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/wedorezo.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ae30cf0702167e6c076ae1fcb381e667/26263817863.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160979e2bba479---83226886779.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/jokokerulufovixepobipu.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/mekidataxojaxewibaw.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a279a8484---4686089683.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/32519965026.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/milore.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e1e666aa7dd7e1b009a28d582add7566/niwunisajimaz.pdfIn PDF document text
    • http://www.hcc-cpas.com/siteuploads/editorimg/file/jozelirukeg.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/jebemav.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c459b69bb---lokumifidozezu.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_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 11648 bytes
SHA-256: 080f6f15241c08a15e8a17002931e080ec7f639b79f778f2483c716449b974fc
font_01_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A2 17044 bytes
SHA-256: df7c8e3300ae4696f71b6ed06f6143cf656d6f6d1b61ff832ae06197b108223a

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