PDF malware analysis — malicious · 618c824207c8b5bb

MALICIOUS

PDF

85.5 KB Created: 2021-08-23 09:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 6d92e06486721ee702109f71453986db SHA-1: b3ad2c66531bdf680d9eec55dfb2e5c181259c8a SHA-256: 618c824207c8b5bb84ec8f48a69dab39118becac3e0a9ecf92e8cce63ca5bb50

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's primary purpose is to instruct the user to open a password-protected archive, likely containing a secondary payload. The embedded URLs point to compromised WordPress sites, further supporting the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb683c3326f---45802864469.pdf In PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a508c05430e0270f185d3dc911b30fcc/guzafunixigodakavemuso.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/90800175095.pdfIn PDF document text
- http://thuexe7cho.vn/upload/files/wukigakuvosuz.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15b8731a10---48966310821.pdfIn PDF document text
- https://yucekalipmakina.com/tsrm1/img/userfiles/file/zokiguxibegekuro.pdfIn PDF document text
- http://thaiboxes.com/piceditor/file/tikimafe.pdfIn PDF document text
- http://tiga.co.th/ckfinder/userfiles/files/muwel.pdfIn PDF document text
- https://autonoleggioassereto.com/file/dinavorejofedekusefapog.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/2eeca673282db8eb09345df526c3d557/18440937288.pdfIn PDF document text
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b94640dee84---kikusojajuzofolorozozofi.pdfIn PDF document text
- http://baobianhkhang.com/upload/files/xalekatinemano.pdfIn PDF document text
- https://seeandhearbetter.ie/img/shop/contents/delego.pdfIn PDF document text
- https://bombapin.com/calisma2/files/uploads/faxazatow.pdfIn PDF document text
- http://xecuoihuyhoang.com/uploads/userfiles/file/kofokokemipopejupodifilas.pdfIn PDF document text
- https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/c3a32814820e3d7c56b7083202c6d975/69468590962.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd212d20ff---72657849347.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/bc3ba1691b8058091aa3edfc9428c5c2/79504437701.pdfIn PDF document text
- http://share-world.tw/userfiles/file/43431870327.pdfIn PDF document text
- http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/raxazibepakatebabaze.pdfIn PDF document text
- https://edbcagliari.it/file/makupifafiwakevezi.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770f9049c59---giwevixoxa.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8qcjk0clgooferfnfo79d52l7q/bomalorusitimemeteginixet.pdfIn PDF document text
- http://bajkolandia-leszno.pl/userfiles/file/5202758543.pdfIn PDF document text
- http://2440027.ru/upload/file/30782358019.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/67909529342.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+open+two+pdf+files+in+separate+windowsPDF 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_off0000e99f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE99F	17124 bytes
SHA-256: `c00c012aa58270b281d1548e7cfe646c2fb3f2b09e975ae4e85641e5a19dc852`
`font_01_sfnt_off00011679.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11679	10568 bytes
SHA-256: `f98aea815bf5d424dbd3cd502475c7a1d9b6ab78c5070f01d4cc10cf4fa0c0ed`
`font_02_sfnt_off00012ebb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EBB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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