PDF malware analysis — malicious · 80833366e3b55bdf

MALICIOUS

PDF

90.3 KB Created: 2021-06-29 11:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 1d6cd819e4f3b72b8e3566e8b67ae68a SHA-1: b1af5d32fa8be2893f906ff19eeab09a193c85b8 SHA-256: 80833366e3b55bdf97f4fa1977b2f05b82db99de544a66ff982922a98a4df391

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for distributing further payloads or phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

Heuristics 5

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=truth+questions+for+boys PDF link annotation
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c7f4d772a7b49c628c1a3011bb7589b4/32271411312.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160dacbbd06f7d---76465178704.pdfIn PDF document text
- https://ceral.pl/ceral/pliki/file/rigagevaxi.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/967cf1aab9a70da157238564b27753a0/fotizoromokuvedek.pdfIn PDF document text
- http://bbpcosmetics.com/admin/upFiles/2021-5/file/remaladivedefa.pdfIn PDF document text
- https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/072461294e6e5acb6aa076f5824cd7b6/vemisi.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/nuvulotuso.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/52263810998.pdfIn PDF document text
- http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3cc38ce7---70662860249.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84afe5b2c---xovavubotufenu.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5835f1350---bururakilovi.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd68362abf---xosowelozixos.pdfIn PDF document text
- https://michelbarbot.com/upload/files/2045924760.pdfIn PDF document text
- http://maslag.eu/userfiles/file/11876719618.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6165e52390---4998708048.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10e5297d37---9640530779.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac189a962f---xaripapojezagijagafaja.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/00sk7fe35dna5ok9sa3d413lf7/razutufalexesonukelu.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1090b1af1d---16102749235.pdfIn PDF document text
- http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/saxazafux.pdfIn PDF document text
- http://sotel-perm.ru/site/file/21732783397.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b39841a2eda---zotobazefezob.pdfIn PDF document text
- https://implant-drill.com/userfiles/file/lawalekutusijuru.pdfIn PDF document text
- http://cupta.org/userfiles/files/20210601125425.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085888372c76---50370336922.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8AA	16812 bytes
SHA-256: `e4563da2ccf475d87744b4399220ccbe7a533a8cc288e61c05c26fe3ab3e60d3`
`font_01_sfnt_off0001144e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1144E	10568 bytes
SHA-256: `c54fd70705fc63a55e8ec480415a3070d80bd742e89d43abd12ae6d483998b1a`
`font_02_sfnt_off00012c67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C67	16660 bytes
SHA-256: `038a3c3e7cf3dc25ed2dac763ba044e6511e8ade75ea9e46e461a74a8ad97993`
`font_03_sfnt_off00014315.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14315	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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