Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47a7ccd4c526db6…

MALICIOUS

PDF

91.4 KB Created: 2021-07-13 21:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b7d26d0873bd60f95645f89015cee87c SHA-1: e2840f32c63e5ad6a04cb8c083f1b5cfb9ded317 SHA-256: e47a7ccd4c526db6fcdf44c1b980a947b7b4c9a295b4bd061c050a330af77eaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm directing users to multiple external URLs, many of which host further PDF files. This behavior is indicative of a phishing or malware distribution scheme, where the initial PDF serves as a lure to redirect victims to malicious content. The ClamAV detection and ML classifier strongly support its malicious nature.

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://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/8f08a6f3adf5b9c422c9e49e7c7fbf10/91673907333.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c43c86652f1---42771870407.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/430dfef98e62834aa27c3c650c28e7b0/fasoruwebefen.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/dabotusafetavifid.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/tirazadijujukogu.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/89773845910.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/60896117576.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/sijebizusoj.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/30847940992.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/mugavulerixifenuvuvagaw.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/21c05ff9fd67caf71304bb2dda9d14e9/xukebefu.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bb1cc47ad---66933947880.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a784dfd55---89318081415.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ddb8a96c8---vagadatasitatabefizu.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160819fff324f7---15664715831.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/30285536157.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/fee210746be315964f59cf4a0b663fa0/60130571506.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/032d12cef5f3936ee4dc3de095d8eff1/zodevega.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/kebop.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b228ac75182---sedaxadurud.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/vs0relt881g775lgjcgfutca7v/42376564861.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1rkk0hpggh5nn3illd9p4de4d7/bikemida.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/u3idnjibdl2modcejs4oj1dmgi/65245342225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=interesting+gk+quiz+questions+with+answersPDF 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_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D5 10776 bytes
SHA-256: db30989610640d79440be16ee6d28ff770d0ea5e74e8a19346bac68562211783
font_02_sfnt_off00013166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13166 18072 bytes
SHA-256: 1252b15f93e2ec0f0495a1e7442d9950151c3d2e46e6737e08d03daa53356257

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