PDF malware analysis — malicious · d2074824bb143a1b

MALICIOUS

PDF

91.5 KB Created: 2021-09-09 14:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ce7f7a5ce4b18feaeaa2c6f323aaea20 SHA-1: d5d67a3b445eb13a8bde61eb655f1fb0fdd11941 SHA-256: d2074824bb143a1bc169cb3fe0ece6d95cd9d6c87f24bdc8878ed70811d3a825

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable domains or compromised WordPress sites, suggesting an attempt to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware or providing credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9558

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://shukokai-voves.fr/userfiles/file/4359782305.pdf In PDF document text
- http://anquocrealty.com/uploads/image/files/voduretemajesejozosu.pdfIn PDF document text
- http://libron.pl/fckupload/assets/file/68608156826.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/s4mpsdqfkvk5ficutuc5bh9e1g/kujaj.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612efff89f842---dunele.pdfIn PDF document text
- https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/6742483549.pdfIn PDF document text
- http://gzafjc.com/uploadfile/files/jefofoxedevepabogeso.pdfIn PDF document text
- https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9ceeba152236393d917c9fe32cf26ffd/voxedugekokugekin.pdfIn PDF document text
- http://clickvay.com/upload/files/90751492510.pdfIn PDF document text
- http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/91882122293.pdfIn PDF document text
- http://www.hzkontejnery.cz/ckfinder/userfiles/files/sanosedaxibelap.pdfIn PDF document text
- http://nanopena.cz/upload/file/dokone.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/73b8b7d16ef5c6e65d3156be6786ed90/jutenijupufebox.pdfIn PDF document text
- https://prcomponents.com/ckfinder/userfiles/files/58136439604.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b569732a6---13016809825.pdfIn PDF document text
- https://wotfiles.com/ckfinder/userfiles/files/66188726904.pdfIn PDF document text
- http://vinaktv.com/storage/ckfinder/files/nidinapom.pdfIn PDF document text
- http://kleinschaden-expert.de/userfiles/file/9897009672.pdfIn PDF document text
- https://vibangthuaphatlai.net/uploads/files/59341335678.pdfIn PDF document text
- http://giga.sk/storage/file/26730003444.pdfIn PDF document text
- https://brawlcall.com/ckfinder/userfiles/files/29822553829.pdfIn PDF document text
- https://quatcongnghieput.com/uploads/files/56568779061.pdfIn PDF document text
- http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/15412470411.pdfIn PDF document text
- https://mbzgogo.xyz/web/img/podborky/files/34175181816.pdfIn PDF document text
- https://atlastoursntravels.com/userfiles/file/vibabixavipip.pdfIn PDF document text
- https://glaze-metalart.com/upload/files/neruzugadiva.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=power+amp+full+apkPDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d619.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD619	16232 bytes
SHA-256: `af293b2b60dc5e826b00d8953dd18f37a59bdd939ad7d7593537948814e7f124`
`font_01_sfnt_off0000ebd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBD6	24032 bytes
SHA-256: `b1e428fef1e8901e2a9d4fdac7be8ef989051056c3753e00b965b977cf3ca8b0`
`font_02_sfnt_off00012786.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12786	1868 bytes
SHA-256: `b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8`
`font_03_sfnt_off0001303d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1303D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_04_sfnt_off00014854.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14854	10336 bytes
SHA-256: `6a649996596c57ca9196fa7abb6054906e1869f7b6a022490bcdf21d8f416dea`

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