Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00aeaa406d6e7ee…

MALICIOUS

PDF

90.1 KB Created: 2021-09-09 07:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 758ac94a0d489e77f06a6c1df51be11c SHA-1: df0009efd6e131507f0783bfed95a345e6da5faa SHA-256: d00aeaa406d6e7ee2cfabe443be38cc2921844b4a5dd6959a23ea4e2631a6640
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=3+week+diet+system+pdf+free+download PDF link annotation
    • http://uptownchantilly.com/uploads/files/wukaxilutasafa.pdfIn PDF document text
    • http://spiregene.com/image/files/20210908_190759.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/jumaxivekupa.pdfIn PDF document text
    • https://vleek.com/uploads/files/temugaba.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/2109032001481830475yr9cb.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/vopojunuxos.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/58678454223.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387b363e934---pexobamajibupibirumege.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec3d0a78de---62566901775.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/fevofut.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/miluzomirizededi.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-6/20210906054738333919.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/68687361462.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/jizuvijugizepi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139514c18eac---fuwibemobolofoteduwiri.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/76940526641.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/82140052269.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/mewovuxefafuje.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/94070540547.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/kitunalij.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613550a9022c7---ledajuxapakifopas.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/11363512143.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/seputupofak.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/tofugelifoje.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/18626005134.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_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 19152 bytes
SHA-256: a3f0229164d9aec587e1eaecd100f3b98428a07d0550cd30ccbd7cc9803e6144
font_01_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 11024 bytes
SHA-256: 604ffe5cd0f38923f1b65304521391197bb7841063dbfa6d8949f2fb0e625a3c
font_02_sfnt_off00014244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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