PDF malware analysis — malicious · c470f444f72c7ffe

MALICIOUS

PDF

73.7 KB Created: 2021-09-16 19:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 29b0239ed2f108046a2007b145504f43 SHA-1: c6351ac1d8c8181163ee5cc4d098c9954572ddd4 SHA-256: c470f444f72c7ffee3ff6149be7e020bf1f70f0da2d405badf0e4232d83e56bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting. These links likely serve as redirects for phishing or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9907

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://coretry.ru/uplcv?utm_term=fcm+django+tutorial PDF link annotation
- http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59529767810.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df376dadaa---59152015122.pdfIn PDF document text
- http://33podarka.ru/pictures/files/19781056640.pdfIn PDF document text
- https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/96268819346.pdfIn PDF document text
- https://csam-villepinte.org/uploads/images/file/44787886991.pdfIn PDF document text
- http://fuhua.tumujike.com/assets/upload/files/202109140257278360.pdfIn PDF document text
- https://alkoplast.rs/files/bemapimuwer.pdfIn PDF document text
- http://hebakotb.net/userfiles/file/18729703633.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161410b28bc547---34429372804.pdfIn PDF document text
- http://dulwichtaxi.com/survey/userfiles/files/3550908513.pdfIn PDF document text
- http://jadever.vn/Images_upload/files/dugoxidonojozeg.pdfIn PDF document text
- https://bazk.info/public_htmluploads/file/2271770664.pdfIn PDF document text
- http://n3ss.ro/ckfinder/userfiles/files/25044139993.pdfIn PDF document text
- https://dovolena-jiznicechy.cz/uploads/47124787097.pdfIn PDF document text
- http://cottoneauto.it/userfiles/files/12095745328.pdfIn PDF document text
- http://branonperformance.com/ckfinder/userfiles/files/95396029190.pdfIn PDF document text
- http://debseven.net/UserFiles/File/41991638003.pdfIn PDF document text
- https://mayphoviet.com/media/ftp/file/2432991084.pdfIn PDF document text
- http://trumoi-khutrung.com/upload/files/32370364831.pdfIn PDF document text
- https://zzhqhi.com/d/files/10416104853.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef35301490---sunevesokaribu.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/68250691907.pdfIn PDF document text
- https://ckmusicdesign.nl/userfiles/file/zamafufabirew.pdfIn PDF document text
- http://sinoorchids.com/image/file/36056623479.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/12815ecaab7d90daef29149337bf25ac/89235006123.pdfIn PDF document text
- https://fiberglasssupplydepot.com/userfiles/files/fulukabetuzuxodapifubojuw.pdfIn PDF document text
- https://giasidaily.com/uploads/userfiles/file/suvisufonepifud.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc28289a0b---mimubijaxifegetuketoduxas.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_off0000bdba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDBA	10620 bytes
SHA-256: `e3b42d3cbf292df632aa17993d744de97bcea6968617e0489df80da062b43ae1`
`font_01_sfnt_off0000d5b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5B7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000edc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDC9	16316 bytes
SHA-256: `1e8b0e3a3abb351551bd6fc1402aab011cd4e50dd4032a006659c0c8b7a386a2`

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