PDF malware analysis — malicious · 657875aa3ec8ea64

MALICIOUS

PDF

83.9 KB Created: 2021-09-16 02:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 39a988744dcd16710af10c7d264b0917 SHA-1: 2fcd95812609c3791e776de315ac9398e4a3a7cc SHA-256: 657875aa3ec8ea64105b017571b90695eae7d8392d2cf5b24608c6ae427f76e2

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and heuristics identified it as a link farm on disposable hosting and pointing to compromised CMS uploads. No scripts were extracted, but the overall structure suggests a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 5

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://synerhu.ru/uplcv?utm_term=hitman+3+mobile+apk PDF link annotation
- http://sdsenlex.com/upload/files/rujuliter.pdfIn PDF document text
- https://ferest.ro/imagini_ws/80210459193.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cabeda5e22---67566144099.pdfIn PDF document text
- https://vico-real-estate.com/ckfinder/userfiles/files/19595282172.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/kik8lgod6bjuq63sh467siaklb/59766317555.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a86d7463dc---kuruxof.pdfIn PDF document text
- https://jotelek.hu/files/file/malifamatavofuginawedo.pdfIn PDF document text
- http://mcutech.net/upload/2021/09/file/16312965321892461498.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/52180279964.pdfIn PDF document text
- http://birizgardenhotel.com/userfiles/file/guviraduvageji.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/denufawim.pdfIn PDF document text
- https://truckforceone.com/upload/editor/file/wilasuxaxupibekirijijoji.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/b8683cff3a86fd2ee3706301084b519e/91450353448.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613772663d827---fabelaz.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/aa6fc7e00f9128ae6c7f9825eefcabd6/tipejid.pdfIn PDF document text
- https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/kikutiwitanav.pdfIn PDF document text
- https://duproject.com/uploadEditor/files/53226796237.pdfIn PDF document text
- http://ivelinabozilova.com/userfiles/file/36619073464.pdfIn PDF document text
- http://mishor-uvk.com/uploads/files/18139527916.pdfIn PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/c7eju7u0kkv9s01topp522ljbh/fupazejawevegere.pdfIn PDF document text
- https://dolaodong.com/userfiles/file/zadabagetozobuxalos.pdfIn PDF document text
- http://rspon.pl/images/wyswig_images/file/dixasokokemeluloxux.pdfIn PDF document text
- https://onderhoudnlgarantie.nl/upload/file/mefiginugakowa.pdfIn PDF document text
- http://cbgnfinance.com/userfiles/file/53567272019.pdfIn PDF document text
- http://sial.pl/galeria/file/vizowifizotuwixilege.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4318cf75fce1b18c194788230b585c8a/xupezofibujipu.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_off0000e487.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE487	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fc9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC9E	10540 bytes
SHA-256: `6a98edf463057c9ccae6d12b9212c92839084f90a334b9325c9d397837c3486f`
`font_02_sfnt_off00011456.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11456	17804 bytes
SHA-256: `93f21b8eff25ed119498e2201457ac3544f036fa7c1471aa2cdc2bf7f6086cad`

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