PDF malware analysis — malicious · 16a78f24b93ef442

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 08:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 449f71f9da8543a7b92d0521ac27d552 SHA-1: b46042c34a1d5546cfdafa3049af22b33c78e1f6 SHA-256: 16a78f24b93ef442972d2ad919ba5c3c1db9b6ad9d4486dd350db787f4b7cf82

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed a link farm within the PDF document, pointing to multiple compromised websites hosting other PDF files. The presence of embedded JavaScript and the nature of the URLs suggest an attempt to lure users into downloading further malicious content, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier suspicious score 0.3684

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.
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
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://meadescafe.com/userfiles/file/vozadun.pdf In PDF document text
- http://mackyz7automotive.com/js/upload/files/17852838769.pdfIn PDF document text
- https://paymentor.nl/uploads/file/nenireforegin.pdfIn PDF document text
- https://ehlibeytalimleri.com/resimler/files/depururovanunitugogegul.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136febae3c31---gizodunazosunufixisok.pdfIn PDF document text
- https://tonitomov.com/picture/file/60423053290.pdfIn PDF document text
- http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/xepupijilanesegupejorino.pdfIn PDF document text
- http://prime42.ru/userfiles/files/fejejelepijivigorudi.pdfIn PDF document text
- http://kientrucphatloc.com/upload/files/guwixatibukoxusiganuxoxi.pdfIn PDF document text
- http://gruppocaminiti.it/userfiles/files/37202979243.pdfIn PDF document text
- http://neoclassicalmansions.com/uplds/file/xesapasoliniriz.pdfIn PDF document text
- https://cbdc.co/uploads/ckfinder/userfiles/files/pizoduxisotu.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402bc050a26---52713041850.pdfIn PDF document text
- http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///77344245270.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/bufevuxuxuwanivamij.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141eefdc2401---26401412182.pdfIn PDF document text
- https://e-fasteners.eu/media/file/xunokivugosowesodezube.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea6e6c8ecf---dujugazumopibixurude.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/49045783567.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ld0ab4fnii2m2835effnukahpi/rasojepo.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/rimiboxiku.pdfIn PDF document text
- https://stopserv.ru/files/file/kisunovat.pdfIn PDF document text
- http://kmconlinecme.com/userfiles/file/jezejizoxemosomavaba.pdfIn PDF document text
- http://pokebarslo.com/uploads/files/tinob.pdfIn PDF document text
- http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/sobivorogofefibewujutabej.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hack+of+shadow+fight+2+special+editionPDF link annotation
- http://perfecturology.cafe24.com/upload/editor/imagefile/3227789232.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e668.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE668	11088 bytes
SHA-256: `faf00f4065ee83fca93143082dbfd4d2325d08769acab2fe0dd83ace1782c08c`
`font_01_sfnt_off00010022.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10022	17428 bytes
SHA-256: `7e3101503269faea23c8ee2d4558dce3e897917ce3b2bed5e44e60694a7864a8`

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