PDF malware analysis — malicious · fa07694ae10dcf1e

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 23:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5d2b1d146790d2f893a787f42dee0939 SHA-1: f1240ef7288d6b8e117cad90c2a8fc47aef7c8f2 SHA-256: fa07694ae10dcf1e70601baa9111bbe318c42eead86de3c1d19d2acc07697393

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/2goggfsl6d22hj6ss0lvhltmb4/35797097777.pdf In PDF document text
- http://galluccifaibano.it/userfiles/file/95004354124.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726ce592050---2656812697.pdfIn PDF document text
- https://canoe.ro/Extras/ckfinder/userfiles/files/luzibimaganupizesenetego.pdfIn PDF document text
- https://asharfilalkulfi.com/ckfinder/userfiles/files/79790716451.pdfIn PDF document text
- http://apogeeconsultancy.com/upload/files/48686145607.pdfIn PDF document text
- http://qiangka.com/ckfinder/userfiles/files/vedijutojug.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/51f56f4e93a86c052037c6c19759e25b/xevurolamalejixisigiv.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612c306bd9205---67212523224.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dad00aa340---26299442698.pdfIn PDF document text
- http://sharon-barron.com/userfiles/files/26744854150.pdfIn PDF document text
- http://sunnyten.net/userData/board/file/2417155142.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160765107f3e3a---60682235746.pdfIn PDF document text
- https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/di8seqvso2mo3hqm1mc3gvrclf/menoloxukexubuw.pdfIn PDF document text
- https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0bfgv5vktto5qidpo38srr946t/97026317830.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f880c04936---vinekemapukonujulowedosi.pdfIn PDF document text
- https://2ruoteexpo.it/ckfinder/userfiles/files/xeduripojopemaxerolobe.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/2fd33d230628a52ca0d74ab3b7f937a3/sololijegunapesov.pdfIn PDF document text
- https://houstoncoinshow.org/FCKeditor/file/pozel.pdfIn PDF document text
- https://camping-du-lac-dijon.com/fichiers/89215977826.pdfIn PDF document text
- https://kme.pl/global/app/webroot/uploads/file/16287552572915.pdfIn PDF document text
- https://isleo.com/i_photos/file/9190800407.pdfIn PDF document text
- http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lajixojuduzem.pdfIn PDF document text
- http://gyogytornasziget.hu/uploads/files/galewujovikilokarodu.pdfIn PDF document text
- http://tokyoto.pl/UserFiles/file/13918506749.pdfIn PDF document text
- http://assotechne.eu/userfiles/files/monaledetiwisuxosubuxijo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cover+letter+for+bursary+pdfPDF 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_off0000ea52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA52	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010269.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10269	10744 bytes
SHA-256: `179108c6710edd42d6d605f7479f5be16eeb75c0b3e3552f058bea29c3e32944`
`font_02_sfnt_off00011b1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B1F	17912 bytes
SHA-256: `7d61f96a1aa83b7fc5713ec88fae1fb6a823d943fad0f0558b58a1abcb61bda6`

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