Malicious PDF — malware analysis report

Static analysis result for SHA-256 222d6a87cdb79502…

MALICIOUS

PDF

82.9 KB Created: 2021-07-22 05:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6efe5e4b60e7638b3fa48e59a1d8e8b5 SHA-1: 8237b199080927c6d8e23f6e6911a36f9605d4c1 SHA-256: 222d6a87cdb79502e7cbaf1a01b24757766b60d28ddc23c22a6d791aa6cae72b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, many hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://thucancakoihikari.com/luutru/files/sexovidolonitezunokenigo.pdf In PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/21226104786.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/f0aed7b78cb4fd48bfaea914d1a63d23/20296994506.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/wibop.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1d8104fd9---mujitikofenozu.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2d04e4b5458e30b5ec84acf3158e058b/muvijilujogorinonugowe.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1c35887c3---83416775468.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/26ce4a55019de9830bf8da55a0f6a5c4/pogajonegu.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/gorovi.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202107/file/wudomaroluxurubimitidot.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/cc401f836884c1b899c34eca95a4ef84/deliwogibenaz.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/32864842693.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/e97bd965fb8851323b5c487f3ee8bff5/baweba.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/79278498883.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bcebe7c28---dikolu.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ace0824d---2347297121.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/81777831501.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8964561916---kubodatogimaposikoxexif.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/23411718360.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/vofituzivumasenop.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/gekaxoxuli.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/donekekul.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/86269581416.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/pexopeluzekerozoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=personal+construct+theory+pptPDF 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_off0000df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 17024 bytes
SHA-256: a3a7a75f36ab287533bcf3343b4b9afed654eb4ec1e4742fccfc64335e067942
font_02_sfnt_off0001237a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237A 10596 bytes
SHA-256: 6ef3ed88f77a4df6161f6223107e79530578d47a9ac8baa5efa6597bb42dd240