Malicious PDF — malware analysis report

Static analysis result for SHA-256 470616accb121cc3…

MALICIOUS

PDF

90.4 KB Created: 2021-06-26 15:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f912ae311f437725037149bb65fcab89 SHA-1: 25f64ff6d5c972918b0c96ce46c95bad67dc0683 SHA-256: 470616accb121cc32cd0c8bccdec8d7062ae2ab83c32ed0b5094fc6a5133af8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to external websites, many of which are hosted on compromised CMS platforms. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=brucella+melitensis+in+humans PDF link annotation
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d54b8eab804a0876255c7235d08a35f1/jinagamanitilaf.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/a60dbf7dab95313fa484418a5bd9d331/nubufavinugit.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/43639297262.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caff58abfe---tajag.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a2b342816---1687002061.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/dutimiremitolexeroniz.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/parj4rlou387omi7sb8e76llg5/luvogotosopidare.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b24844c6a760511bd566496f5e279232/lepulusopidokudus.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/06e0295375434ec8304b70994ccbae6c/wupesumo.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/fojosegafejoj.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ffd005a10---42905859931.pdfIn PDF document text
    • http://avgdesign.com/userfiles/file/xupifova.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160785d3600762---78613877436.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b6b0d975f00100c30da17b17b0f4c35a/fomuragavozowosud.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e93be4b90e58a41c9e8b1b6ccdfe0ed1/ropemezujud.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/7aba9e96637227cbe6af65e50463884e/83386200991.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/fdeb589285070787e501a9f825b6c969/37406810492.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/14406401565.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16080998117693---3393395029.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/gumotikif.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093daf34ff7b---95043010083.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf9a371e9c---wofufuguroxupelolaneta.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 10528 bytes
SHA-256: c9bb42b288d8a6485d48359675d5b31b95113e3384a0a746facc6e6f25470ccc
font_01_sfnt_off00011752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11752 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F64 17164 bytes
SHA-256: 197d3f13e21048633e5c95a2275790e80c97347721588d9359773f60210425ef

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