PDF malware analysis — malicious · 46c784ac2265486b

MALICIOUS

PDF

92.1 KB Created: 2021-06-27 12:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 8b337c3006401e95c6e5367a237f291d SHA-1: 10e6f7f8810f05a983344d2a22dc442b8d8af6a1 SHA-256: 46c784ac2265486bd4dc7b731ba864fc8ec2af34186407ec756ef24a6fcdd1af

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://wastran.ru/uplcv?utm_term=boxing+day+football+fixtures PDF link annotation
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079292925d98---powasa.pdfIn PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/49a6d1c94c0055fa890a24dee011bc51/wibikeletuvaxonufitevel.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d932d7bd2---27245508049.pdfIn PDF document text
- https://i3mit.com/shopadmin/upload/files/2194973192.pdfIn PDF document text
- http://brilliantsolarpaneling.com/userfiles/file/teletavo.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc4b34f63b---2475197828.pdfIn PDF document text
- http://xahscw.com/userfiles/file/24276479373.pdfIn PDF document text
- http://kameleonhastanc.hu/files/file/32067875492.pdfIn PDF document text
- http://orlickachata.cz/files/files/walegep.pdfIn PDF document text
- http://turexpert.md/userfiles/images/file/30326377503.pdfIn PDF document text
- https://bocion.com/ckfinder/userfiles/files/5841267964.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/08e3fc062181297cb8a49fe513598108/tidegezekatapomo.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f85327c459---batewo.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6d6d1e898---xijavogofube.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f36f8b233---dobibadipagefazog.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1ccbba4f9---99135109696.pdfIn PDF document text
- http://nage-z.com/ckfinder/userfiles/files/24159720957.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608218fcd9630---61265328825.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a7225c20a---58221188149.pdfIn PDF document text
- https://bishopsalamatkhokhar.org/userfiles/file/ravirajekiwekuzasoguzar.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa039e3135---dufel.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/csljg93var104856e1usrpplvo/13042639401.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/qqhe54qsdg9ga1bsp8qlosg9hh/xuruxa.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/4b52c8dd9d1d51fc6f72e22279511f90/duwoxoxojedofusado.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_off000101e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101E4	11036 bytes
SHA-256: `37eaa7c1dc132dc1c23cf5f3e6e6f41fd42d66c559393537822c4d18e96dfb77`
`font_01_sfnt_off00011b94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B94	17496 bytes
SHA-256: `378b06055a0a32d37dbe9eaf254445dfa4e5587ff72b38191c1bd700652e6579`
`font_02_sfnt_off0001496d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1496D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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