PDF malware analysis — malicious · 7cde966862969a07

MALICIOUS

PDF

90.8 KB Created: 2021-07-04 03:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 8eb47e9c8969f65a099504393c84e80e SHA-1: 19f02677194cbee64c8ff9e99a9ca95fa0278942 SHA-256: 7cde966862969a0766badcb0aff0ed991898af65e0ab7d3d1dcbc5a1fa49eff1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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://laborke.ru/uplcv?utm_term=what+do+isobars+measure PDF link annotation
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa13c0693d---75099039371.pdfIn PDF document text
- http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/jugobodabawutoze.pdfIn PDF document text
- http://fujavietnam.com/images/Download/9610119083.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b599c9f678713adca7b1c0f6feb2d0ac/60776371735.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/6iq13bilbunceov0cj4i8ofrpj/5173097320.pdfIn PDF document text
- https://werbemittelag.ch/upload/file/85207246027.pdfIn PDF document text
- http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/13404800802.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e6b476018---46663920021.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/vo88jg6d3c51pr40t7r0a41525/siwawelejikazujesefan.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/fdvtvr1ofq6amrvh2ab9u4a9g2/tugijekamavazutepek.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a6c5cba8b50ab3a72ed3bb5eadd5950d/guluzazamokabu.pdfIn PDF document text
- https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/k5fdelj0tcg1rjq4tn3jumgned/75673006751.pdfIn PDF document text
- https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7f658c061cad89387ff0d5600dbe14ab/favuluwafozev.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/37a14cce5b2a2c18a8f825f1dc9c1a85/devovetugig.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/92792051306.pdfIn PDF document text
- http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad81e251603---2313491926.pdfIn PDF document text
- http://evevoyance.fr/adh/.-/file/zewefoseba.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/906750d118b0cd62a6b1cec89390dbe4/44077424831.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160727a9b23848---jafofumevisol.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/ec0df9c944a0242bbc642f2363eb21f3/1679370701.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/39rhj5o0c0u2mlgvcphq9an8q4/73451285658.pdfIn PDF document text
- http://talleresjpg.es/img/file/54582519978.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_off0000eb33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB33	16252 bytes
SHA-256: `bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4`
`font_01_sfnt_off0001010f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1010F	16948 bytes
SHA-256: `a3382df345d092d3a0965e94f25137f3cd9e136b92a449f9171bbc80b611cbfb`
`font_02_sfnt_off00012d54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D54	10596 bytes
SHA-256: `62dfbb45876ce8cabd5a9b6a58cc90f0b8fca5265e4b03ebf63e2b62b0258303`
`font_03_sfnt_off00014593.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14593	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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