PDF malware analysis — malicious · 123df6666ee69e58

MALICIOUS

PDF

83.7 KB Created: 2021-07-01 10:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 1f0cadfd444e7d7cafd326d7d2d7ddb1 SHA-1: cc166a1417889fccec4941a518b62ee5dde21836 SHA-256: 123df6666ee69e584d7fc9f47806cf270850b2fdf2940c78f172525e1669f5ea

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, directing users to numerous compromised websites. These sites, in turn, host other PDF files, suggesting a multi-stage distribution or phishing scheme. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs pointing to potentially compromised CMS uploads reinforces this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9925

Heuristics 5

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://philabc.ru/uplcv?utm_term=download+blackpink+forever+young+mp3+download PDF link annotation
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/7690a79cbda24a95c121ecdee408252b/dozujonesevabaxivovana.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/539b46053c85f6fab277d4bca8c8d6ea/92272270561.pdfIn PDF document text
- https://hmanagement.net/userfiles/file/65604447878.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6de1ralkjqlnu2i2h1s6joatk3/2752329255.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a067789bb9---zigazoveketi.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e89c547ae3424d93373fee89bf2b887c/9977817975.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd90f670886---7088028028.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088eb6b1a702---87148735670.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/okjrq9dlbsu19tnk0hujg1gip7/juxejek.pdfIn PDF document text
- http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/82158681541.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29deac30a9---risas.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbac5ad18e9---sajavabimedujitore.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f88ea55ce---dofusudazenobovofewajinu.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a4df40199c5a185ea854324eed97aaf6/8398134523.pdfIn PDF document text
- http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/lenigemofojofir.pdfIn PDF document text
- http://budohurtsa.pl/userfiles/file/tufumigesigomowowuninajiz.pdfIn PDF document text
- http://casaatlantida.com/userfiles/file///62047345429.pdfIn PDF document text
- https://tonwen.org/userfiles/file/sukulu.pdfIn PDF document text
- http://topup-fight.com/ckfinder/userfiles/files/zekiwapoxebavipida.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea4c50f0ab---93141925145.pdfIn PDF document text
- https://feldmann-spedition.de/pics/userfiles/file/94536640708.pdfIn PDF document text
- http://pro.ovh.net/~tribuene/images/banque/file/gojuwogakulunalabig.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bf75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF75	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d786.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD786	16144 bytes
SHA-256: `fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516`
`font_02_sfnt_off0000ecfc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECFC	2612 bytes
SHA-256: `7cf0a595c07eb280cc3810cdb810657c86209c88b9596b1ec8e0e1afbfa5b4ce`
`font_03_sfnt_off0000f7db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7DB	17256 bytes
SHA-256: `abf4c186ab613a549f27b4a6fd8b765db569961be2fdda7f40541cb0437d74fb`
`font_04_sfnt_off000125b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125B4	11468 bytes
SHA-256: `88b04e42bf0df4773e954c2ca302d7489e7ea61dd8eba67112fefb1273a94934`

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