PDF malware analysis — malicious · 26da097ccc5c4f25

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 08:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: b4cc41734ddb513eaa173940e37c0385 SHA-1: 8ef58b35cbb7186611e0c708bab740f47e3eff8f SHA-256: 26da097ccc5c4f25e697cd2eb939cec18c14564277c938ed341de9be1d950462

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.3497

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
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
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://eviinstall.com/userfiles/files/3559753336.pdf In PDF document text
- http://malbreil.com/userfiles/file/viladadogozupurafevajol.pdfIn PDF document text
- http://liveranigioielli.it/userfiles/files/faverufonukijemoj.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d01ec01f9---42828526182.pdfIn PDF document text
- https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/2b492f79edfa054f30a1b4a6ffcf712d/revatid.pdfIn PDF document text
- http://droneducational.com/admin/userfiles/file/jikabifasarekugif.pdfIn PDF document text
- http://korean-school.hu/hangul/userfiles/file/galinezujifetokovud.pdfIn PDF document text
- http://etnorom.hu/pictures/kumos.pdfIn PDF document text
- http://pmrs.ps/userfiles/file/xanovobajejigewofedi.pdfIn PDF document text
- http://xhzhengli.com/upload/lazezepebas.pdfIn PDF document text
- http://rlangkhan.com/upload/userfiles/files/39154172861.pdfIn PDF document text
- https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/namumumivakufixilula.pdfIn PDF document text
- https://anyimaker.com/upload/users/files/79422608438.pdfIn PDF document text
- http://mwflower.com/upimagesfile///gubotediz.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608380507b36e---14746722229.pdfIn PDF document text
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/14afa20162a9341f8c30d490443a3d8d/81746820344.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc167bbed4b---31856031557.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/10682794644.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/p6l2c31bhc714f3vnohmiensml/78218415971.pdfIn PDF document text
- https://fzclicks.com/demo/files/editor/file/zajig.pdfIn PDF document text
- https://sailstudy.in/ckfinder/userfiles/files/30051457273.pdfIn PDF document text
- http://www.toeterloeh44.de/files/rugutexafafuwiwagidifawuz.pdfIn PDF document text
- http://derma-dts.de/files/file/13409095904.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/392f77df431ab4547b5f31390758ed96/vemadanulogamiluv.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=bosch+security+alarm+installation+manualPDF link annotation
- 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_off0000efa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFA3	10760 bytes
SHA-256: `0ee2ce4846fb1e7e9836f9b9250a18328ae8c74a0924baa64ed89e1e91f4513f`
`font_01_sfnt_off00010844.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10844	17672 bytes
SHA-256: `650bd475cab990d279c4502367658bcfeba60bbc4837db03714382cc1ee72254`

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