Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bada261431aa76…

MALICIOUS

PDF

86.6 KB Created: 2021-08-17 04:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5a87913fac28ff19c430c557fce6726a SHA-1: ee84b55438d08a9ab487d261d8fe07dd7aca3f0f SHA-256: 46bada261431aa763ada2b0014002ffaa012f907f7a9c9d1e5f0060085678311
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9987

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://igabana.com/upfolder/e/files/20210611232953.pdf In PDF document text
    • http://kukdae.com/files/fckeditor/file/68471666257.pdfIn PDF document text
    • http://bbu.vn/Images_upload/files/96914003849.pdfIn PDF document text
    • https://activepymes.com/pub/file/92097483387.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff29f93a5e---90051055946.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2bc3d0b3b6746e673efb34183e98ce3e/11721894863.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/27810516837.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/12796584695.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/bilobi.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/jojawilaseme.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/833b88102c4336586ffc5998657182c1/rinasotagopowi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081442871b78---73249518473.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f528049c081---42649414910.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/d08c2770f12e19970af4632fff062692/99607052694.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/masavegir.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82a04cb01---71195853710.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/93173895214.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbbc6dcc0---javajonewu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/8c7f57174437ad6834b322147b204807/sirunatesikadakagaw.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/kobitozisowarabonob.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/50001143391.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/kikubuxexoxixisigarov.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/62601575744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=easy+lower+back+exercises+for+seniorsPDF 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_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 10748 bytes
SHA-256: 78e9af0b11fc912e5cd6337db33f04645c858ab810e0182e2ed98469874bba88
font_02_sfnt_off000120be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 16680 bytes
SHA-256: 10a3d85f4db47acf56ae090133e94697b0b501717ac5830a3488af788249875c

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