PDF malware analysis — malicious · 7df1009885ae2754

MALICIOUS

PDF

71.0 KB Created: 2021-08-31 22:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 61d2f03f9aa551a06864c5b688d8e4e7 SHA-1: 8bcbdf0ab01e1a8e1d378c4ea6d0de75478d91a9 SHA-256: 7df1009885ae27540259d53f67082ddcb53e2bcba14edfebd772947d87ec91f5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. The document contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the PDF's structure strongly indicate it's part of a phishing or malware distribution chain.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

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://monkey-do.net/userfiles/file/nutajojafil.pdf In PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f2b4553f53997239166d344abbc3fa1d/petotovum.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ddakrj6apmolrv66j90clv8ko8/tapadojexef.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/175bcb5ca157e5c398570b0c830464a1/75060771301.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/efc1ef80bf3e7a4a62369d02a7e4fbde/lijowe.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/58ab175e92bcbfa5340a4e16181302b6/29697249713.pdfIn PDF document text
- http://phongkhamthienhoa.org/images/files/12107829739.pdfIn PDF document text
- https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/tl872oo15t6c3ms5iono4cp45b/jufokulusifatijupoz.pdfIn PDF document text
- https://majorsagilekvaros.hu/uploads/file/wajomewafakiwudulug.pdfIn PDF document text
- https://prosaison.fr/userfiles/files/ravawezawimojidoke.pdfIn PDF document text
- http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/7515056263.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1d80ed28---61120910355.pdfIn PDF document text
- https://aadharshilaschool.org/userfiles/file/kolagipumizan.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4bbe1d632---kuparegupaxesidodenibo.pdfIn PDF document text
- http://cmuniontravel.com/userfiles/file/33850100730.pdfIn PDF document text
- http://thaiboxes.com/piceditor/file/11691854386.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a128c98cfb1---12386382700.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d081671e9---kikukesuzu.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aff654023b9---57366742554.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f6c51b6e2f2---42911155164.pdfIn PDF document text
- http://palaciodelosnavas.com/userfiles/file/29243930165.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/v8hi90lqrclgjtqar7md27dk35/29662491937.pdfIn PDF document text
- http://monarchiaerembolt.hu/tmp/25943514888.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075717a1d26d---norekojemeve.pdfIn PDF document text
- http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1043367499609c7e401ee02.pdfIn PDF document text
- https://rijst.nu/userfiles/file/5648055387.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/pafedexeluvor.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=seo+tools+article+rewriterPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b9e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB9E7	10280 bytes
SHA-256: `ea8b6098693ad9f455b8dc241dc39728a364c0d39f1d71a019a4d7b28c9e3072`
`font_01_sfnt_off0000d139.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD139	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e94b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE94B	14784 bytes
SHA-256: `5ad91fe0d3f2d5eb98c64c3816c78344246f9cf67b33e56ec7090491da34ff4b`

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