PDF malware analysis — malicious · 129fea0ca06dfc0f

MALICIOUS

PDF

77.0 KB Created: 2021-06-29 00:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 2dbcd6d480abe1cbae618a4f3d9d6f6e SHA-1: 79f2b01e2245182c991fa1460a5d16be77bf7570 SHA-256: 129fea0ca06dfc0fa721c677af00dba909d457e7cbf1cec39b9f3229e592974f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The heuristic firings indicate that the PDF is designed to leverage compromised CMS uploads and disposable hosting for its links, suggesting an attempt to distribute phishing content or malware. No scripts were extracted, but the overall structure points to a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

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://oniceh.ru/uplcv?utm_term=reflections+on+silver+river PDF link annotation
- https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/66f1a2816f0dd8f0f0d9858433c0ae8d/ketemikixixevexunizorod.pdfIn PDF document text
- http://taxicityplus.ru/userfiles/file/sagepapemulekasiwino.pdfIn PDF document text
- http://timebank.ru/sites/default/files/photos/pagefile/9606889900.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/fd4b5a6016dd0b8a78bcbd0d7007afbc/50728569712.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087e4bfa92d6---jidomerozesovuwexedazixe.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/memak.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082b9019c008---29364880241.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/8460e436053dd4a51a65d49de24d2634/nememinalipidinori.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084411063611---vetigivokixomotak.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/keziduroxiwoxite.pdfIn PDF document text
- http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/defarebexamenosiluwof.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/g23585o0j7pn545k5p21ve08k0/pireropizaru.pdfIn PDF document text
- http://bouncebodysupplements.com/newerac2c/userfiles/file/9416678824.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d6755359c---merefabaxiramu.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0d21601b6---4611088208.pdfIn PDF document text
- http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072084ad2909---setanefepo.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e13cab824---weteli.pdfIn PDF document text
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d018aadc084---71407186326.pdfIn PDF document text
- http://westernmaki.com/uploads/files/22073448929.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c2594b4f8---goradubimazovelopezalanif.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/92cdaa0d36bfca7d6e21ba75210a2090/jujisotaliredanarunumum.pdfIn PDF document text
- http://watthaistuttgart.de/userfiles/file/nitup.pdfIn PDF document text
- https://ivaco.it/file/nozataz.pdfIn PDF document text
- http://www.chatanakonci.cz/userfiles/file/63653189677.pdfIn PDF document text
- http://alexanderkanevskyartistbiography.com/clientMedia/file/vikinopelunuvewixap.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160708206d6184---ziboxolakekolix.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c7ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7ED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dfff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFFF	17496 bytes
SHA-256: `ac9b12e0fc06720b8d1b3d2985193e2ca634f44592328b82ac4007ef07154626`
`font_02_sfnt_off00010d68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D68	10280 bytes
SHA-256: `e2dcf4af088dd6c79e3e6c36cb187433b9373b3f0ffe51cdf270460f4c4035ab`

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