PDF malware analysis — malicious · 135666d8beddef97

MALICIOUS

PDF

78.7 KB Created: 2021-09-28 02:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 79604dd9e7e110c38d3662a220ac5241 SHA-1: 1066d06b686ecd2014219b14215e93bc91a4a84f SHA-256: 135666d8beddef97a2cbf430bb78633fb290c00a8d22e63e69d3d5beb85059f5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. This suggests the PDF's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/lavazusupoziwa.pdf In PDF document text
- http://strategie-online.net/catalogue_dynamique/file/kabivoboxekupikekufoja.pdfIn PDF document text
- http://xn--2o2b17g32e8xisqq.com/userData/board/file/84959520743.pdfIn PDF document text
- http://studionegro.net/userfiles/files/33023973252.pdfIn PDF document text
- http://bytip.net/filespath/files/20210919223517.pdfIn PDF document text
- https://inprovitecuador.com/ckfinder/userfiles/files/36334500665.pdfIn PDF document text
- https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/35247430746.pdfIn PDF document text
- http://droneducational.com/admin/userfiles/file/merivajifamis.pdfIn PDF document text
- http://slbreakingnews.com/ckfinder/userfiles/files/12914353333.pdfIn PDF document text
- https://lawrenceyezersky.com/userfiles/file/pututawomun.pdfIn PDF document text
- https://aldaserwis.pl/ckfinder/userfiles/files/bixuwufizegelekijuziwozuk.pdfIn PDF document text
- http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/25360654686.pdfIn PDF document text
- https://sahodayabbsr.com/test/fckeditor/file/97723713338.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614510755d49e---54878679425.pdfIn PDF document text
- http://moretonassets.net/userfiles/91990538207.pdfIn PDF document text
- http://netmutum.com/userfiles/file/20470903981.pdfIn PDF document text
- http://myphamasia.net/upload/files/valuvenubotisidamatevo.pdfIn PDF document text
- https://virker-ikke.dk/files/96003498436.pdfIn PDF document text
- https://jbdclothiers.net/emailer/userfiles/file/lazizixut.pdfIn PDF document text
- http://ikkosushi.com/uploads/files/65139664636.pdfIn PDF document text
- https://questyme.com/userfiles/file/82573590915.pdfIn PDF document text
- https://uleiuri.ro/userfiles/file/fekud.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138327519992---kojeterajirede.pdfIn PDF document text
- https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/nopiwi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=hanuman+chalisa+pdf+imagePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b44f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB44F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cc61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC61	19520 bytes
SHA-256: `6eda9026a28e452b6e30936381dca3b91271ad8106c656d90afa0a402880fc7e`
`font_02_sfnt_off0000feb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEB1	16164 bytes
SHA-256: `a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1`
`font_03_sfnt_off00011457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11457	10840 bytes
SHA-256: `e424e76466bbbfbdad6a7a0f1ddd09293c33ec1c5d9511527eefd1556230df91`

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