PDF malware analysis — malicious · d7a167583a0346bd

MALICIOUS

PDF

85.7 KB Created: 2021-07-18 18:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 2f5fa51dd48b365474d64cf770ac2afb SHA-1: a6f050431a3087a62ef89d82f5617fcc6fa38efe SHA-256: d7a167583a0346bda9d4780af6dc53b9a569c0099b8328c48d1e9131260263da

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The file's structure and link farm characteristics indicate a likely attempt to exploit users through indirect means, such as directing them to malicious websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 http://citadelcaralarms.com/userfiles/file/rojewijerof.pdf In PDF document text
- http://topcudental.com/img/userfiles/files/sasozunenuguketorewilojix.pdfIn PDF document text
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/p9d3lkhejfsr1193gt2jl3sjno/rozixem.pdfIn PDF document text
- https://pabrikangka.com/contents//files/88851809753.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c332a9826---xexopufudaxuzosupa.pdfIn PDF document text
- http://technology-mp.it/userfiles/files/96506616634.pdfIn PDF document text
- https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/e76o83tuqufoddb1hbk5ccgfh1/71541990258.pdfIn PDF document text
- https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/b52681d988aae97b1b8bef860d470c6f/3062474935.pdfIn PDF document text
- https://menu2uplus.com/images/file/vusogudojat.pdfIn PDF document text
- http://popnmusic.fr/userfiles/file/somitoxoxadaruwowoxefijim.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/i31kd974njp7f0ob4utaqjvdb4/77891794887.pdfIn PDF document text
- http://pnmanagementsolutions.in/uploads/79850986633.pdfIn PDF document text
- http://goodwill.pl/userfiles/file/37696642260.pdfIn PDF document text
- http://www.impactit.in/ckfinder/userfiles/files/7482983630.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/c98cc0b2e9b715a56a356bdbb6124ca2/namebuwolibibevunopu.pdfIn PDF document text
- https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/4568b9b749afe6bf8bbea90e2e097fb1/fijuzarar.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fb4b0cae5---fapunulaxivefepema.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f15e0dd6b6---50163098665.pdfIn PDF document text
- http://runo34.ru/attachments/file/81310933894.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092becbdb11f---lifevimewutaxalepefomoje.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/dde87b73d4841abf84df21fe9e3db950/nupoputexenadowefi.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ak94b7mr1lvch8h1ago5kfvm07/16875004636.pdfIn PDF document text
- http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/83569582228.pdfIn PDF document text
- http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/07cb111e2323d7dd1d82cd9612093ed7/powukupobesira.pdfIn PDF document text
- https://gastriklandsbf.se/UserFiles/files/91957007534.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=national+jewelry+appraisersPDF 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_off0000ed09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED09	16796 bytes
SHA-256: `9a238f54cddd766a52cd9d9baab29700b3b439df1ef0fd6679f10050ea9dfaf9`
`font_01_sfnt_off000118db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118DB	10552 bytes
SHA-256: `c4244437133d8ff27c43295838df40adf1e98aecde78a2fa97b20d17b5140dfb`
`font_02_sfnt_off00013115.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13115	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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