PDF malware analysis — malicious · 1a90bf9ed45d8236

MALICIOUS

PDF

85.6 KB Created: 2021-07-04 18:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: cd837459db969c5fde20b1751d00ac63 SHA-1: c0298a0d5ecab7891243c281f23f22d4e6f14d73 SHA-256: 1a90bf9ed45d82369142f80794bd26fc89edf30cab3e4b24abf0e99cfb2e6999

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristic firings and URL analysis point to a link farm designed to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://peaceinsrilanka.lk/userfiles/file/tumonumutawinavodeziw.pdf In PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087980b7381f---67739777421.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075659cbaeba---97742946866.pdfIn PDF document text
- http://aftckwt.com/uploads/file/8345622400.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf9978e63---feduros.pdfIn PDF document text
- https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/cu6na06trhtnuoo0fa2l6pooie/wesigakodafiku.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e260043cf---65938935088.pdfIn PDF document text
- http://chi-kara.net/userfiles/file/9653236243.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160704622b5ae0---70972879676.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b34e3e8e62a---podifelasejebin.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdc95a49c1---kejisikikonitifipasafu.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/597bf75b3a84a43a96a95800b2ebc409/98667406536.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/597f88f0f10b91740d7a9d4e2069ff3e/nenawedonaduvali.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/eekl7tbgrfs1puno8b8ap4hdv7/lamobiberajatedoxifunu.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b046587991---40883338563.pdfIn PDF document text
- http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waxorupomapul.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/79021746486.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c12378e17---32339831405.pdfIn PDF document text
- http://harasim.cz/uploaded/files/19260801364.pdfIn PDF document text
- http://10glazsikeyrosa.ru/file/tofopuxufezotusolowuwap.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c745d782e---18251775212.pdfIn PDF document text
- https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/nlrabe534h89p44vsi5ferebvo/xefipuw.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/38efabc7f7dbf9c277a9c190067e6e27/jivorigosiledavapuve.pdfIn PDF document text
- http://xn--k1akb4c.xn--p1ai/userfiles/file/10242974113.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e3acabf39f7012f607415e06bae14fb/2619642789.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=shadow+fight+2+edition+special+apkPDF 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_off0000ecd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECD7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000104ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104EE	11172 bytes
SHA-256: `910b4c5deb6d17aca62ac830830c4893f3f385c5f1d4faed248dbe7c87aa6593`
`font_02_sfnt_off00011eeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EEB	16208 bytes
SHA-256: `ea624a42988cbc2c03f6106055883e5ea7125f8dbd7e090725e3694b7bdb0b07`

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