Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ad954be75c828b…

MALICIOUS

PDF

91.1 KB Created: 2021-07-15 16:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3f97e32cd507291f68b5ce58665cc88b SHA-1: cc8e26ef77efdb2ed6e721f29d3cdb1c8ad9bef0 SHA-256: c0ad954be75c828b3237f04deae8c752859b8a94303bfe8e4402ee30da74d5bb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://charivne.info/images/file/bujurekoragiwasuzoge.pdf In PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160be12df830b1---76975570912.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/20932206335.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/39aa1057e50aa11c7a9457110502d60b/mepolobinexusivagapewow.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/kezena.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb98c61480---kowavuli.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab8ccee4a---guvanoke.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/23298770747.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ad75ed9340792a847ef060c081fd4185/kejozomerusedo.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/16096993314.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ab95c4550---53369499373.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/19466969936.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/ad196cd67d002aace86a9a8ba6a836ec/nonenirewewu.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/dd150e8245b7ffbcbed8fb4f0f580e87/xerododosesamujasowa.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/31626726558.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/salizinizobogokovok.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/nevuxago.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b082a1e4c90---75778815352.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/d66100f18fb642dbabaea361d9c99159/87731619420.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5a79ca5c5---61154567132.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074b2537c117---kasozu.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/87896252906.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/75464959180.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/28591622738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+kill+with+a+command+block+in+minecraftPDF 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_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 10880 bytes
SHA-256: 93ccb27b439fe0ccf29be0d7d75be1b2eb718c1401a69d4f9705a92c050c4f43
font_01_sfnt_off00011633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11633 17684 bytes
SHA-256: b41e33af6808c38cefe5bc89e4f7e4734de7bb0711c8f878972d2a3f484beb85
font_02_sfnt_off000144c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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