PDF malware analysis — malicious · 9aba867cb8d9371a

MALICIOUS

PDF

89.0 KB Created: 2021-09-16 13:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 19004c658f12c9cf33a20d6a9a81dbf3 SHA-1: 69b67df83ac9c59ac43ef7d70da04e0844d1df7d SHA-256: 9aba867cb8d9371a6bee384bfca6a4d0f841b21cd55470b6dd0e5f01e35cb5cb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9764

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.
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://pixomot.ru/uplcv?utm_term=big+digital+clock+apk PDF link annotation
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb7df5b871---zuzamiluvazelujexonete.pdfIn PDF document text
- http://saeronbio.com/userData/board/file/96747609434.pdfIn PDF document text
- http://kdsonline.org/userfiles/file/deridus.pdfIn PDF document text
- https://nusamulticentralestari.com/Uploads/userfiles/files/91988721187.pdfIn PDF document text
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161392f0aa1586---namubodotuvenekiruxom.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8b63c3b43f46bf65a0835eca67ea8e5f/1701650669.pdfIn PDF document text
- https://sangolongphuong.vn/longphuong/news/files/tojebariwu.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/54602126780.pdfIn PDF document text
- http://goldenpeak.it/userfiles/files/lisefimudazusijopusumewut.pdfIn PDF document text
- https://kapokcmassage.com/uploads/files/202109111721284946.pdfIn PDF document text
- https://dalilak1.com/userfiles/file/besumexuzu.pdfIn PDF document text
- https://pakianco.ir/data/image/uploads/news/files/87665419476.pdfIn PDF document text
- http://axi-hohenstein.de/userfiles/file/rijelov.pdfIn PDF document text
- http://meubelenindex.nl/images/uploads/fuzeperaruxen.pdfIn PDF document text
- http://imhome-listings.com/userfiles/files/wobutezajuzariveginani.pdfIn PDF document text
- http://top-caster.com/userfiles/file/putedurizekomaxidujilu.pdfIn PDF document text
- https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/kabonajakiloradalegukub.pdfIn PDF document text
- https://semangkamerah.com/contents/files/vefodesomawopijaw.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134da9a0b395---83624789645.pdfIn PDF document text
- http://hfengly.dk/skoleportalen/userfiles/file/mitemowixasuvuwawib.pdfIn PDF document text
- https://e-motorcycle.tw/upload/emotorcycle/files/71343163529.pdfIn PDF document text
- http://ambvetesopo.eu/userfiles/files/61847132781.pdfIn PDF document text
- http://prestopc.it/upload/file/31535931495.pdfIn PDF document text
- http://carsonpokebar.com/uploads/files/vabara.pdfIn PDF document text
- http://tonghuichem.com/upload/files/78885465542.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/849e36f14ce0c0af10d43cce27757a35/88611865023.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d330.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD330	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB42	24952 bytes
SHA-256: `50467705c106b2a1a886cec13c2bdfc4aa90c8045c241439201026c184b099a7`
`font_02_sfnt_off00012928.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12928	16060 bytes
SHA-256: `64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973`
`font_03_sfnt_off00013e3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E3E	10328 bytes
SHA-256: `2681f685dd141a36c58035061a410d0986199b96e8341c8750a0d380cf5ebe7e`

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