Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b692293270500fd…

MALICIOUS

PDF

85.7 KB Created: 2021-07-10 03:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5c38efbf1cc4d5d20bb5c1dea1e4a0db SHA-1: 9708c7349a74e560200b07a5dac5a7da19096bed SHA-256: 0b692293270500fdaaf90f19edc85d11fa22f1ea718f0a7e13af1aacb76705d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites acting as a link farm. These links likely serve as a distribution mechanism for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the primary attack pattern being a phishing lure or malware dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://austintownfitch1980.com/clients/879833/File/83386000426.pdf In PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f71438d7e21305aaeaeac7a52318f2e5/xemovurujunuwosedakefuvex.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/pubegab.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/focqjka09se2v1676df8kpamlv/63885907042.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/91ce9fe45c9b8cece972a7d905d13711/rejede.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc5d53adb---47543692722.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/12be7db60f3d9cae54add6d789c80ca4/9526072024.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/77229181266.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a687c83c7---kujizefuvobugezev.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/825340288441620577832.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608214572a13d---pumososema.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096034bf1bbd---45555929856.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/mezofixek.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/37080656907.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbe9cec5d9---vidatuzikudin.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/tizisawefo.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eeca236f0---kejesarojewulavurajim.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/b9466276369857d80f978a67ac71c679/likirurok.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7tm9falrp8h90qgef4b93f1hp3/70698536765.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/b99b8c3fc22bb7b4b371619b75c16903/58059769248.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/49f35e4be5c3be78189cff7c3f2ce066/jigoketekeziseguvuvebu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cd3c73279---7094678765.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd97f8885b---zewuxojewedaxav.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/13468484479.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/tusiriketidezeso.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/parojivilusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=best+temp+for+tankless+water+heaterPDF 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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 10760 bytes
SHA-256: e97bd5d71f46bc8f3643dca270943c64798b85891501ce92bd1c59293b0d84c1
font_01_sfnt_off00010551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10551 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D63 16836 bytes
SHA-256: 7ae8141f0c25f9a1628f4b014ed9a6817362d977fa36903172797f3ec38f7b1f

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