PDF malware analysis — malicious · b0392de18f74c656

MALICIOUS

PDF

90.2 KB Created: 2021-08-04 06:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 067bdbac4cd70bc09ba692b564685f2e SHA-1: 4ae9f1f1d76f1b0733bf6df6a72977aa6e7fe187 SHA-256: b0392de18f74c6565964fe7926cc3e5ea50b0abd0689140cecd4a27bc1209a09

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://philabc.ru/uplcv?utm_term=how+to+choose+my+airtel+dth+pack PDF link annotation
- https://damiel.eu/userfiles/file/32827175346.pdfIn PDF document text
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/ea48137875c746475909ca3a8373a3ff/47868417436.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bd68a8867---moluvurokarunedukato.pdfIn PDF document text
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/spiqr8civ8s76m8kk6sg0sjc93/wikuwerox.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095544e48dbc---mojifutenajejukaxetarodag.pdfIn PDF document text
- http://kaztelcom.kz/ckfinder/userfiles/files/gadudiwar.pdfIn PDF document text
- http://brukbet.com/user_images/file/39313780944.pdfIn PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/8l61qqiqm2p0j8m97a0tj63koh/najasejeroli.pdfIn PDF document text
- http://atthaya.com/file_media/file_image/file/ruzupud.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/vjjk8vu9gikm2k7l72e1qvekvn/50497239029.pdfIn PDF document text
- https://imagebeaute.fr/userfiles/file/nafitid.pdfIn PDF document text
- https://bursakaynak.com/userfiles/file/5160991890.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0799ddc17c---wozasapovora.pdfIn PDF document text
- https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/8198449305.pdfIn PDF document text
- https://greenlakepaint.com/ckfinder/userfiles/files/sirubenojonofesoma.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/80d72963b0f35fe865b40e411559d14f/49235771035.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/99107431765.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5ae98d2b---razutabuwozobolakevemer.pdfIn PDF document text
- http://kuresi-kaitori.com/upload/content_pic/files/dutinirikofalavizebise.pdfIn PDF document text
- https://laurallo.com/ckfinder/userfiles/files/jalebunijef.pdfIn PDF document text
- https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/0d490a88f7d004d891d20f3a47482d61/642633328.pdfIn PDF document text
- http://synthecinter.com/userfiles/files/87375620823.pdfIn PDF document text
- http://chatyzvule.cz/uploads/70546162341.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/51d610487a3dd42a565e5f444050dc44/sukebilewa.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/746ac8d792dfef8ba396b63ec8b177e9/4410541011.pdfIn PDF document text
- http://kapelski.pl/userfiles/file/beroneripukamoga.pdfIn PDF document text
- 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_off0000f90d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF90D	10956 bytes
SHA-256: `c438e96cb4a0e8f5e80d7b5b2c4ec65ea3f6e1b29faf78f91f62eefe1ba1eb0d`
`font_01_sfnt_off00011285.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11285	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012a97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A97	17784 bytes
SHA-256: `cd6afa2483911b426e87221ea906cf71125d55a44c590e79e71efb34b6e0428a`

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