Malicious PDF — malware analysis report

Static analysis result for SHA-256 42768fc4e5da10ee…

MALICIOUS

PDF

94.1 KB Created: 2021-07-05 08:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 909c90de50117a57906243fbf17ba1fd SHA-1: 99e1252a94f89fb7c4007b576879b2f2bafea61d SHA-256: 42768fc4e5da10ee830c8e41c52366b549172df4b2490b9650910c0d76e8c614
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4631143b4d8f6404625591f7904b9039/gidamalanalakutina.pdf In PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c88afaad---39532163129.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4435b9c3e---37612048440.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16074798ed9560---16937141311.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/moduvumuwenunoxalugesob.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/qclnro940d0je1r6att767clu8/tiropikukikelemor.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/womejuvekelozam.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dac178fb8---zikowemotejumuxe.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/90a4078b0c05c28c13bf724f66b4b090/67379226526.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608507221f3bb---labisalonaxojozuva.pdfIn PDF document text
    • http://houselandia.ru/files/61707973982.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c540932d34d---94644081130.pdfIn PDF document text
    • http://anupbolivia.com/images/files/78934107053.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/ponuxonofalasuxagituded.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/0f84f4f1324e03607ca872afc8da2672/mowovozowadiv.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/2a68e42b56c107a0de8b2669fa6f8c67/73909162425.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8569433391f4a4151fc8eff26e42bf29/pokejifafufobuliropedo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/73sonsdila8tq8bb278b5jd3ap/37611774205.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/vibatarekazasenijo.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/1bf6f37010d84a0b8493057f98b21259/jijeje.pdfIn PDF document text
    • https://netlandschool.cl/files/rovovuvibevinapidajoboga.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/39a9c31d50c906f7682c03ae1b184bab/watozitopebumug.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0a64f3d4---vuniso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=does+mosquito+transfer+hivPDF 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_off0000f709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 17840 bytes
SHA-256: ef3f215422438d1229857165b88b823f5fe7dd67c88fa7a056d3a2d77594e526
font_02_sfnt_off00013d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D11 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_03_sfnt_off00015288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15288 10744 bytes
SHA-256: 2616b229240a4be96a13b08a9ec8a4e907d7f4519471ffac4a029a843c071d12

Open this report in the interactive analyzer, or submit your own file for analysis.