Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fbdc67e5cc02cf…

MALICIOUS

PDF

86.7 KB Created: 2021-09-19 19:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 65d4ab272940c4baea4630d95072f5a9 SHA-1: 478cd52ddf51028cbdbe22eaebb71d5e98430541 SHA-256: 29fbdc67e5cc02cfa971d4a9b4fec2b425da89c6af9ebcf1a9843f0d30ff18c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which appear to be compromised or hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it functions as a lure to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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=pokemon+platinum+version+apk PDF link annotation
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2c563950d---53683896117.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/98359193652.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/59107210843.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614752774c67a---39753447537.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/40036029144.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/e45kbijdg78tdmst425tnj54n6/bubotovokupux.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/xilanagajalunanaruvafifi.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/42828978363.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5ba24d4d0c2c0500f92e44079035affd/77666265622.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/3194769021.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/vexosobagesis.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/0tp4kpoub73i5ka2pbe01alun1/86992579885.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/pexamena.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/m690v75sc9qeah436a228vvqm3/24451926243.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/zebapalebisoralamo.pdfIn PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/kuxiwisonun.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/burumurotibefedodixafeme.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161326410a9cc1---rinemekosevusezafuvol.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/84a6ddf457f175cdec53240cedf673f8/34258394505.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16132ae6a87fb2---fejikofulusoguvitanij.pdfIn PDF document text
    • http://denge.aero/upload/files/lopokeninil.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/74050055582.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/17515840232.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/76732344074.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/17633597409.pdfIn PDF document text
    • https://suncables.co/images/file/dixojeronowoviwoxawoziw.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_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 10672 bytes
SHA-256: 3500bdf6c6d87e77d4673580774d035e5ca61f423144f16503114e5bcf4bcc95
font_01_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0C 18048 bytes
SHA-256: 0ad1f5ee0a5a677bc193e2b0d5f4fd629412206d2264042f6582fffe1bcd3d76

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