PDF malware analysis — malicious · 96b5e670d6b1aa2e

MALICIOUS

PDF

85.9 KB Created: 2021-09-15 23:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 48f698990d1f068f525e00bcfbc2c580 SHA-1: 7cdc5da6d8ef3b0633cfce92b3e63da8c8cc1951 SHA-256: 96b5e670d6b1aa2e139a3985246eba8f9f40e4729240723d1caabff55c2ef02a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also assigned a high probability of maliciousness. The primary attack pattern involves directing users to external, potentially malicious websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=gba+advance+emulator+download PDF link annotation
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rujukabobivowan.pdfIn PDF document text
- http://werder-ritter.de/UserFiles/File/28629501017.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b5e865264---livozez.pdfIn PDF document text
- https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/137h5b8l8umhvgnco6elk4ta5l/32336747048.pdfIn PDF document text
- https://506hlapeta.com/files/file/dudenidagulezudawuz.pdfIn PDF document text
- http://ks-system.co.uk/ckfinder/userfiles/files/9823287959.pdfIn PDF document text
- http://gustosandvic.com/ckfinder/userfiles/files/15240266051.pdfIn PDF document text
- http://veitali.com/upload/files/25346821754.pdfIn PDF document text
- https://kaimano.it/file/tobam.pdfIn PDF document text
- http://lesmashclub.com/imgUpload/files/7744026412.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0d9bf00d6---xoniziluxurinidal.pdfIn PDF document text
- https://cribpointonline.org/cribpointonline/userimages/file/jenidukakesire.pdfIn PDF document text
- http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mevalagawugafowisatesal.pdfIn PDF document text
- http://imhkayseri.com/resimler/files/1573388646.pdfIn PDF document text
- http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/romunumadopatubukosejaz.pdfIn PDF document text
- http://thanhlapcongtykiengiang.com/upload/ck/files/29702843349.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/9143d5021fe322be0bc5667b1476165d/44271043063.pdfIn PDF document text
- https://mamap.in/ci/userfiles/files/52280971315.pdfIn PDF document text
- http://cuakeobinhduong.com/upload/files/nozanokafa.pdfIn PDF document text
- http://chanakyaaerospacedefence.com/userfiles/file/nukijat.pdfIn PDF document text
- http://www.urbanwaterways.info/files/86969952578.pdfIn PDF document text
- http://0851gay.org/userfiles/202109file/2021091004322570554.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/fd327a957e98c0198b1b47bfeb46847b/povadogulabuwobul.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e904.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE904	10700 bytes
SHA-256: `e4383a9fa28822ba2a18d94719521d69ff52299b4c34b0fca521a699ab7e7c26`
`font_01_sfnt_off000101a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101A9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000119bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119BB	18320 bytes
SHA-256: `bbbab3748bf81d77cacba8e2fe29f7185abed882ae262bfb31db4add6278b865`

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