PDF malware analysis — malicious · d56ee8bda030e53e

MALICIOUS

PDF

86.6 KB Created: 2021-07-16 03:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 82feceb37f801d56ceb4aa470a2e1f42 SHA-1: 0cdfcb7cede5841cb482e31db52e3009d5024dc6 SHA-256: d56ee8bda030e53e9babb71799e521cea04ef9d827fa7b0fe2d4d3986dff33d8

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to external PDFs hosted on compromised CMS upload directories and disposable domains, suggesting an attempt to trick users into downloading further malicious content. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a phishing or financial scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
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://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160842e98274c0---74500402805.pdf In PDF document text
- http://ehomeforeclosure.org/images/file/43139885154.pdfIn PDF document text
- http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210517085744.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cca7053d29c---58660380001.pdfIn PDF document text
- https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/58rh19g893q2a7hil79b5ev5j3/75291890855.pdfIn PDF document text
- http://gmkms.net/upfile_editor/2021/files/duxivoziwusofatujoros.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/94687d220a14b04ccab75fb5de62a36c/51682092581.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6ecea0363---57212176756.pdfIn PDF document text
- http://www.zaluziemalina.cz/userfiles/file/96808203581.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/5506udki1nik8qfjub6sgvsmfj/vetufesodejupazagegosuwur.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c44c23bcdc---xokogisuwef.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a305993ccb---93297334818.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab074a06cac---zejakowokeselidugawop.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1a0b2a02c---7497587925.pdfIn PDF document text
- https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/de02d32d0d76c734edcedc41d18134ba/gumub.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c195bfc62de8b19d8e54c3ca5dfc608c/gijewubulovibexodeje.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9688f2100495f901aab47eb1824e7fd0/29374494641.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/45592813924.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/be40db591a1aa4916b6d9e6601fb2b11/pifugotimekop.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/m0mn9ua15drgbnl7rj13tmvuhp/kidolumivaregejamajilili.pdfIn PDF document text
- http://assushop.com/userfiles/assushop.com/file/25664547751.pdfIn PDF document text
- https://asi-filter.pl/files/file/veduwudinor.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609443ac1a620---17273191042.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/24bfeb6452ea6788bbb6177b8a651cfc/pikofol.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/43279850214.pdfIn PDF document text
- http://mashtalkandil.com/userfiles/file/redasirojalelokajegerijap.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee0daa39c2---wexofadenitatavavoxap.pdfIn PDF document text
- http://global-insurance-broker.de/downloads/23879989438.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=plot+in+narrative+writingPDF 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_off0000f0c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C7	16848 bytes
SHA-256: `a71249bc25e658db311de91d2f2860140828ccccd9e5d6317fddcb70d8b0d55c`
`font_01_sfnt_off00011c1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C1D	10268 bytes
SHA-256: `d13eb5004867d170ddb1440540129b37745269c5c31cd2b13ad563d59a7b7f7d`
`font_02_sfnt_off00013362.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13362	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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