Malicious PDF — malware analysis report

Static analysis result for SHA-256 7670544b8bc3aaf3…

MALICIOUS

PDF

78.9 KB Created: 2021-08-02 16:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0efd7f32a2145cf8a4f0b4018e14de0c SHA-1: 19c9dabffd3275bef3f484858fe5fa75aaac917e SHA-256: 7670544b8bc3aaf37ae97add4ab78901cff131ab87f24f415daa771e18214fa6
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 0.9995

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://huntic.ru/uplcv?utm_term=bekhayali+song+download+female+version PDF link annotation
    • http://zonazero.es/userfiles/file/fejep.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/024bcd95b574f31993265117ee9b5596/19637906234.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/fd36c16f632ea860053f7f8f2f5ccb44/lasevinow.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4e4ee33493ca6fedd39bdb95b43ee3fe/91046525465.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/69465626433.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/85689651595.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ff0076c8409---40173502722.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/14d38319894b7a9942113f279e73e805/xixapisoze.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/xomoxitesonulomiwakojot.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/21246054631.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/657194c1dc8414be388a2a92914bf508/nogewezabanedevewozo.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/4879386715.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/62c7148bc50a99e5f0d73ac182f6a48c/70399757694.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774884f392b---rakogemilugoze.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/464fd0faa4563481d53b51d22951f054/tibipipamezojibe.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/57133297880.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///mikabatu.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a129ae52dff---20062382398.pdfIn PDF document text
    • http://haileylusk.com/clients/e/e6/e6412a3df854040bfb282c4f37eddf02/File/50567335210.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/24779778767.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/31150916455.pdfIn PDF document text
    • http://generoussecurity.com/uploads/lilomu.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_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 11116 bytes
SHA-256: 900ce60aa955614b970d7125b137947b681e97396410c4a495f602c68fd23b68
font_01_sfnt_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 16656 bytes
SHA-256: 87987431cd100880296a64e8414819a0fe9b5158033a03b400808746aabcc6e5
font_02_sfnt_off000115b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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