Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6adf82e964283ed…

MALICIOUS

PDF

79.3 KB Created: 2021-09-06 21:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0816610ce6ed41c9fbc6a25c49ba1a2e SHA-1: 2daf5963d6585c0e2c8facebb5d887bf376ff678 SHA-256: d6adf82e964283ed318c4944757b5b156d044a0da4117b42ed6a2c0281119ffd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs, many of which point to compromised websites or domains associated with link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://dbcasagayathottam.org/assets/uploads/cms_images/files/wewikom.pdf In PDF document text
    • http://abwrosedale.com/uploads/files/197192104.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/jibobojuvixukowomi.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4297abcb0---pezejesola.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/84ab482fa8237cb89113f00069c039af/76165341808.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8e7381aba---lojurumaloliwimabimaned.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/mizaxebum.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/5598314241.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/m3ug7ldr7uk62086bopriie7qg/jufudumoziba.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/05255a701bdeed22ea6d2e5c4a723092/31330014553.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/gerakoduzeve.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/32086180453.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/lupedubabufipatetemexu.pdfIn PDF document text
    • http://namlinhchisapa.com/userfiles/image/file/91888415388.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/a39c541afd13428911a54525f18adfb9/57656561228.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/ruxinaxefuluvubokaj.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/463385cb8acb3d4c01f8d82fd0bc8199/45287242865.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/79901790658.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16118338ae91b9---bibefodupinin.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/13956332108.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/xetepumis.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ium49k8onapo2fsac4v36qahm5/futekaruwuxetofobujesobi.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/lcediurg2dn15rjiinnk8heeu6/13011445838.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0227b1932---lituz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sum+of+exterior+angles+of+a+triangle+worksheetPDF 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_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 11116 bytes
SHA-256: 1f172d74457f1ed39be150d87ac13178dde1f8c43a21c6f7f0161125f189ec21
font_02_sfnt_off00010279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 17312 bytes
SHA-256: 806bb6a3389c71c28abd04221e5d20c31fff45df9c1b4b4239759a39c7c21ac0

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