PDF malware analysis — malicious · 4963859475cb9fea

MALICIOUS

PDF

94.4 KB Created: 2021-06-26 12:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: d514a98a4ede6708b99c35c0601fdfda SHA-1: 08a26ba7e0f1b6af7b884a49fdcb8c7b808af477 SHA-256: 4963859475cb9fea30f5fb0b8d26701b376516b918d488d3c14fda1f4073a1ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous URLs pointing to compromised CMS uploads, suggesting a link farm designed to distribute malicious content or lead to phishing sites. While no scripts were explicitly extracted, the presence of multiple compromised upload links indicates a likely attempt to host and distribute further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090bf5d09248---25675843068.pdf In PDF document text
- http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105030010239511.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59126bd8d---63566414232.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/3c924oulvt49j6loikclllp7pm/nofarixajotekowo.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160745942ed1c6---pimepijofagexi.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/4d0e4fe8f0fc0dab5b7cc563328dee42/pifujezavosudegive.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608862439a42d---supovopebozazo.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jfp5ckve6i70m65f67ijuokoh6/nutan.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/45cac580724cd2015d0e190dcae2b3cf/tajuz.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/2f2e7fcd5ac9f3ba991e6a211c4daee9/xabitisasejodipe.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824c8b4f3e3---xujubelojokodu.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/93723273360.pdfIn PDF document text
- http://gorisum.net/fckeditor/upload_file/file/velawimasisi.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2067673a88cad9fd3da696d8792a9cb0/78664512204.pdfIn PDF document text
- http://renovator.cz/files/file/xazimumigude.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/huvgderppe7edal7borf84ogo1/xamojalixuwomomesavu.pdfIn PDF document text
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2a09fc2e84137cf99c90735822751c74/39164362959.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa9c75729b---tiwinadiji.pdfIn PDF document text
- https://btsmstlucia.com/atomicsteps/upload/userfiles/file/tuwidokatenozufutofo.pdfIn PDF document text
- https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/17210dfe2dd73c1ceeb2c78d9dfd43f9/xuzisodusig.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160831ac6b0d8a---32381475616.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160707859b3505---zalavuvafevekidedun.pdfIn PDF document text
- http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a650a891690---50191126821.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078f27ea9f77---74666156560.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609272f5267f1---54441950661.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce741719da2---pigujelemiworege.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ssc+junior+engineer+exam+previous+papers+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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1C4	16092 bytes
SHA-256: `9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd`
`font_01_sfnt_off00010705.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10705	18192 bytes
SHA-256: `1716f1eb7fcf8e7ceca75121fc92bb51897ce4d063e6a3804ee23a702370e63d`
`font_02_sfnt_off00013736.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13736	11292 bytes
SHA-256: `c4a235a656ee252c445353bb5a4125cb771640744ea9a8903120cae6c9f005d2`
`font_03_sfnt_off00015186.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15186	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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