PDF malware analysis — malicious · 4a96b696d7013794

MALICIOUS

PDF

78.2 KB Created: 2021-08-06 08:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c85372a60f5bd16b4cf2266fcac45891 SHA-1: cd97b61f84d0231861866a59bd03a9ef078a9d8e SHA-256: 4a96b696d701379456c143e94813c3aa5edd2a2d570b58bcdab46cc3343f06d9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF sample was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, directing users to numerous external URLs, many of which host further PDF documents. This behavior is consistent with phishing or malware distribution campaigns, where the initial document serves as a lure to lead victims to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3985fdf2f8c7b8efba1b08ce47546d93/47535126257.pdf In PDF document text
- https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ibi3i5ms5q6psv4dj9628mnhh7/todumamigonagabo.pdfIn PDF document text
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/gormfv52gn0ndq2lbgecjaqesk/27020773992.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857dc1c30c6---pezopulenemewonivuga.pdfIn PDF document text
- http://www.petercar0937494634.com/upload/img/files/72456914275.pdfIn PDF document text
- https://adikkeempat.com/contents//files/tenisiperopilame.pdfIn PDF document text
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/ef31ad8e8c9318ad0595bf452ada3bb6/1283828898.pdfIn PDF document text
- http://waterreducer.cn/d/files/22237003750.pdfIn PDF document text
- http://verypool.cn/images/upload/File/mowodewenolemipesive.pdfIn PDF document text
- http://calebdobe.com/clients/875189/File/18591364666.pdfIn PDF document text
- https://aedwea.com/upload/foto/risurivajuk.pdfIn PDF document text
- https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f8e53ad4c---fagukexaxoxezinebeni.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d315c62077c95acafabaf76ad6486a32/9137822128.pdfIn PDF document text
- http://kvbm.org/pds/userfiles/files/86139142555.pdfIn PDF document text
- https://nakipoglugroup.com/upload/ckfinder/files/zexisalenejorizezazi.pdfIn PDF document text
- http://ckrestaurantgroup.com/ckfinder/userfiles/files/mebiwagoxum.pdfIn PDF document text
- http://agendaalzheimer.org/files/galeria/files/97583480402.pdfIn PDF document text
- http://immodraft.nrw/images/architekten_agentur_images_/file/66109543375.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fefc3b4391---45726638721.pdfIn PDF document text
- http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160816a7809719---92011328772.pdfIn PDF document text
- http://musorcentrum.hu/files/article/file/67370961357.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f4b5ed77---zoxaxewikogin.pdfIn PDF document text
- http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jemufakupav.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160812b92f3be3---7283414706.pdfIn PDF document text
- http://nawooelcs.com/upload/userfiles/2021/07/files/210703214559.pdfIn PDF document text
- https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5492d8ca8---35503698893.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=caller+id+change+app+for+androidPDF 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_off0000d014.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD014	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e82b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE82B	10664 bytes
SHA-256: `067f5f3d99aaa4dbae041601beac03c2d320db0b852c048de9adbd909fb31f59`
`font_02_sfnt_off0001003a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1003A	16748 bytes
SHA-256: `d5e79dba86c51fc1eb194e66e47aec08251445a2b56765b65bd5acd1fd138cf2`

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