Malicious PDF — malware analysis report

Static analysis result for SHA-256 019089145f2e375d…

MALICIOUS

PDF

81.3 KB Created: 2021-08-17 04:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 4906321b280b09e8f7eae9eb48668a37 SHA-1: 8669d4ef638dd4c62fb9e272e02bec3541dfff94 SHA-256: 019089145f2e375d31335f4210e27ab1d30b0e28d6030bc28552b631ffa76179
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079d0ea790ea---rapaxexematije.pdf In PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iji6c7r4l8efkpicjeo69oopk1/sorevedodeto.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a99e58b5143fa36dcb54e21a4a4c7f90/28867769277.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/0bd64e3af22b07bc0d7243f1d0c2ca23/91741034326.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609611c36e2a2---lekavixomazijozunalaru.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/gupusox.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/00927a5b15015c106f9d63c11f663515/fasedetufeja.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210617_183025.pdfIn PDF document text
    • http://regmac.net/userfiles/files/relovelubokanodupobulesun.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6c457259fefc729c6d1aead8512dd6c5/ratazudipazuto.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/36969044022.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/a2903938bbce44e5fb21bdcab5e75016/puwuxevinek.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/57885929175.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/58421944798.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/wiguw.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a71f49b1a---zirib.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/54739521963.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/xifeselatowuwar.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/xuwebofeburuvixafug.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/tunusipakabetexinopixonep.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/68425770343.pdfIn PDF document text
    • https://alohasafaris.com/files/66041597367.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b70433b3a---vujapulipasejovofek.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/62449972708.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/44531b9216e590fab11a3f731c0ded49/rejobokasunatisujar.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610ef084d1f01---26931123322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+replace+heating+element+in+maytag+epic+z+dryerPDF 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_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 15900 bytes
SHA-256: dc0945a277edf3d010f6ef9cbc478be87e1bc60be26243b24d2505a91172019c
font_01_sfnt_off0001038e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038E 11044 bytes
SHA-256: 7ff25f82fe9397b176f3dbd2992cbcd0d6cc062c9dc5524aff9343c3f1893a38
font_02_sfnt_off00011ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1