PDF malware analysis — malicious · 221d705defd0e472

MALICIOUS

PDF

91.2 KB Created: 2021-08-08 11:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 089befbf29c19ce6cba751b115d0bd97 SHA-1: 9b112a9c8e62630c22f8fde00eba4e6297ac75c6 SHA-256: 221d705defd0e47268542551209150577b7f7eb38a71ef47023eda6ea47442c3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware distribution points.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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://ketchas.ru/uplcv?utm_term=rpg+maker+mv+character+generator+addons PDF link annotation
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/76b017b78f980e08978333c82e1d7461/xogunikajupotonos.pdfIn PDF document text
- http://art-lan.ru/uploads/assets/file/dokawizapovalixepomiwif.pdfIn PDF document text
- https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8a393130---luginunuti.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b34fa9a7b---22306030734.pdfIn PDF document text
- https://1877painters.com/FCKeditor/file/bajubiz.pdfIn PDF document text
- http://yorkiematch.com/clients/6/65/653dc45b8f6063886304ac4260dbb99c/File/bajijefivumexexezob.pdfIn PDF document text
- http://studionegro.net/userfiles/files/punovifeviburixa.pdfIn PDF document text
- http://ressourcengarten.de/azubi/userfiles/files/94225551192.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/kfu5t4kp6dluf6899j29fvfc6c/96800765281.pdfIn PDF document text
- http://dishandspoonproductions.com/ckfinder/userfiles/files/73151999954.pdfIn PDF document text
- http://tourister.kr/userfiles/file/basupejud.pdfIn PDF document text
- https://ibextrail.com/editor-images/37418039741.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609920afee454---mepotibajavakalitefuvetid.pdfIn PDF document text
- http://fluellensoflandreth.com/clients/b/bf/bfbe38bd58d8cb8bd08b82175287e3b3/File/64662792579.pdfIn PDF document text
- http://ever-pioneer.com/upload/files/vitepafugenajutizof.pdfIn PDF document text
- https://paklya.su/design/img/upload/file/33148474212.pdfIn PDF document text
- http://live-net.it/file/mafedisira.pdfIn PDF document text
- https://skvely-kup.cz/files/file/burilu.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160832b07678d2---buwegalafuxezigisiwegi.pdfIn PDF document text
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f104442a49a686a2735bb9282da7c2ff/xipugapimazavikeval.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/23388077177.pdfIn PDF document text
- http://ronaldtan.nl/images/photo/valokupepamepigiz.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609696dc6caf0---kilaz.pdfIn PDF document text
- http://tm.luckIn 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_off0000f516.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF516	17664 bytes
SHA-256: `a18e37a4511074119ceded514ed29f6d9cf6ade035823ece5cd6e51becddff8d`
`font_01_sfnt_off0001237b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1237B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013b92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B92	11028 bytes
SHA-256: `7519212d35fc7edc6fb5ea4b5f4b4bfef59c005f5d262393b6c8a7ed5e838133`
`font_03_sfnt_off000154de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x154DE	2036 bytes
SHA-256: `43f1df96f129f087c3a043bb22240c7a48223fa219c8a76cdbdf350bf15a45a5`

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