Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc023bc2a5621734…

MALICIOUS

PDF

93.3 KB Created: 2021-07-21 22:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 183b40d2388be4737c34caf670012987 SHA-1: 3f68b4b9338e9415e88900310c84f0d199c772f0 SHA-256: cc023bc2a5621734239190daa53dd00bf8751341e2735ce05deed8e5c3bc22bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/vo8v9b2os5t10aadf8kdtnno6q/jabakozafalusilemafom.pdf In PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa190eb81b6---10933519046.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/23405220832.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/33427439201.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607868c08e49e---pagelemu.pdfIn PDF document text
    • http://7onseventh.org/clients/868256/File/98345550075.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b1ef452e1---98902774047.pdfIn PDF document text
    • https://aedwea.com/upload/foto/fezuwozenolotukixozexak.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/0ca45e1ee8df126b1e4f4c1b82e18421/womipajugejenu.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/10612330796.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/mojenatorufod.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f9c1085f36fb97094372f74b296e62eb/22585831153.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/bowesutawetoniwevelug.pdfIn PDF document text
    • http://asfalon.com/__files/file/zadukogigijube.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/9040716030.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/1d998d46994a12e0bd3d0419def30682/nubafumel.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160705ef13269c---getoguwaxix.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/depetipesitamifiper.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/dugazevufirofum.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/7demh5jasibm1q7grg369nr172/92703554864.pdfIn PDF document text
    • http://hydrem.ru/images/file/71172109216.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a7d47649a42fbf5dfb8b73af3be8c73c/davomalen.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/07qmkspflqcqgq73ct7tnpi0o2/sarer.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b7187f1b5e596c32b17953a788176ef3/36766355765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+draw+desert+eaglePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 10304 bytes
SHA-256: bde64f8140b963241a2855be94e0d2f4dc06368115475a150b6634174d1cb1d0
font_01_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D04 16524 bytes
SHA-256: b0a75a24cd315c8c4188a540d169c314ff8e345784c42a9930ef514e31b5c671
font_03_sfnt_off000133ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BA 20120 bytes
SHA-256: 7562b16afdaaf85d5ad5f6749cbcf02deb90035c880ee16a978f0078b1cdacee

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