Malicious PDF — malware analysis report

Static analysis result for SHA-256 008fafe520856480…

MALICIOUS

PDF

96.7 KB Created: 2021-08-01 07:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 88818ca712329d565743e86de85edc97 SHA-1: 638eaca7201d3bc8248d48170ee5a7a8843eb7d9 SHA-256: 008fafe5208564802b1137b64def4d519628c23f575363b3843d79a52ac53a45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/forawomefete.pdf In PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d22fa690a6a992a1da95be5dd264354e/jozuvifofuwiral.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a084d7bb82c---vojumiminorimozak.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e6a468fb0b3a757bd88769413385f8ca/45387895170.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/27867386348.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/20397436514.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/tawuzuma.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/khp1jrbk5useic070vtk5dkok1/bigenogemez.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608eebb4602f4---jivawiliruvufebimopadad.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/rediwate.pdfIn PDF document text
    • http://mlight.cz/archiv/file/69668967487.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/21101044504.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/keligipopuk.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/22399518830.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/21281433724.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/83268477381.pdfIn PDF document text
    • http://vtaky.sk/media/file/benoxazanusam.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/62939041871.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/sedonibizisi.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/10269073768.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dd04809df---nuzavazejifubaderiwujopaf.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e4ab824331acc6dde6e557b535430f82/nelasupo.pdfIn PDF document text
    • https://drlanda.hu/user/file/18869102503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=writing+an+argumentative+essay+about+an+ethical+issue+rough+draftPDF 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_off00011526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11526 11336 bytes
SHA-256: d6d734483534c4cb91d10109562d5b2e8d435947258bad5e8fde5dc9877c9475
font_01_sfnt_off00012f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F73 17112 bytes
SHA-256: 211aa1cf1c58aee101d1905afa549ab5a4a9cd722c096a27fa857bddc4244d06
font_02_sfnt_off00015b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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