PDF malware analysis — malicious · 18b272e087977194

MALICIOUS

PDF

82.8 KB Created: 2021-07-16 15:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: a22c83f668763adc85b01e31ac382634 SHA-1: 46543ba99c3fe1e376143d7d4d21afb22f5411fa SHA-256: 18b272e0879771947bb048c0acef1db16828b51ec60946a30eff723d84123c8b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The URLs point to compromised WordPress upload directories and disposable hosting, indicating a common tactic for distributing malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9928

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://crewmak.ru/uplcv?utm_term=nate+the+great+saves+the+king+of+sweden PDF link annotation
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075fbd51dcf8---vawalinove.pdfIn PDF document text
- http://beautybybelief.com/admin/images/file/31443919666.pdfIn PDF document text
- http://life-worldwide.org/assets/uploads/files/60277298342.pdfIn PDF document text
- http://cybernet.asia/UserFiles/File/1492597505.pdfIn PDF document text
- http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/tojezopopilixi.pdfIn PDF document text
- http://twtipa.com/upfile/files/2021/06/29/14911082803.pdfIn PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077511640297---zerevewidagagejewo.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/boaocri1b51ffq0omdodpovug4/4921474169.pdfIn PDF document text
- http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160792eef42515---24596226288.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b403ca5639a---81927487982.pdfIn PDF document text
- https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fb7fbf14e---82224673274.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a437a822d---filelixujakalekelup.pdfIn PDF document text
- http://zxsolar.com/d/files/21905082493.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd837fefc95---dimerajasi.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/bozir.pdfIn PDF document text
- https://alice-immo.com/userfiles/file/34709228173.pdfIn PDF document text
- http://yljx.cn/images/upload/File/40414044781.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/h0ajail2nhvmhdtm32jihlavm5/87739591088.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f6e6b5986---57489741774.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c006319f0a---9040316652.pdfIn PDF document text
- https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vpbtb8fqk509matvefihnpe812/32332671755.pdfIn PDF document text
- http://massageindex.nl/images/uploads/69007150153.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/mqs1a5lafq45v7ht8o171p7eij/wifewijebelodujeba.pdfIn PDF document text
- http://xiaohecollege.com/d/files/34563783057.pdfIn PDF document text
- https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/o7kukh9p6s40l1emgipv19k02m/gegilonewitumobukomixuv.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ca09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA09	17312 bytes
SHA-256: `69d5098a9615f8d28b2adc9e3c74d3db47b80bfd569336771aaf6d96e9fe7954`
`font_01_sfnt_off0000f713.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF713	16092 bytes
SHA-256: `9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd`
`font_02_sfnt_off00010c59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C59	10808 bytes
SHA-256: `3eb4c0aa9490f4647878fe16d16b11d7ee794fbfb0d084eba1939ed072da48ec`
`font_03_sfnt_off00012522.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12522	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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