Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fc175ef4354d8b…

MALICIOUS

PDF

76.0 KB Created: 2021-09-20 05:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5736dc87fd993e5d76c583d1cb16d6c4 SHA-1: fad95f748cc9be200775fc3a6c33dca50436d907 SHA-256: f0fc175ef4354d8be93c00d4f083fa239f01e7a6bfb3dd3ea4b3c91c594ed7ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://garglob.ru/uplcv?utm_term=descargar+king+of+fighters+97+plus+para+android PDF link annotation
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/92962751809.pdfIn PDF document text
    • http://newcityhk.com/userfiles/kenotatizagiveg.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161344bee2accc---xebivelumuluwowigudaxefob.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/bofadugala.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614408008a695---49256216575.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/65000968945.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/15128772282.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/89686598304.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/35250473625.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/868794cf7f40ef0b430d2e10f6e020ce/zawazu.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436ed3e6842---vewakabujedawowexidiko.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/jusafovamerako.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/aonraq126fl107f8jq9u8hc280/79276001076.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/92791816700.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/ludagazifuxipamomonida.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/49459473108.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16137a7c0b4ffe---85355828335.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5984d6561172588bce2ec8c4f638bb18/62837041455.pdfIn PDF document text
    • http://kaies.net/upfiles/file/23828064884.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/fewokuzukosisumok.pdfIn PDF document text
    • https://masukpt1.com/contents/files/gopevusiseb.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ade9f474e6---69064235711.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_off0000c103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC103 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 11312 bytes
SHA-256: 100ab0bc35226ef0af57f66b4881a88445c0cdf57c85eee978d945ed5f151c8f
font_02_sfnt_off0000f382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 18092 bytes
SHA-256: 3e76b8a16001815c2cbe85b3ccee0dddf16ad2e2e93c8623cead8b9f66674aae

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