PDF malware analysis — malicious · c6d940667fedb258

MALICIOUS

PDF

86.6 KB Created: 2021-09-01 13:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 072ec5ed489421d6f42dd2d0d2dda7a5 SHA-1: dc0e837db3b91a6d5102c4b946d150557734eb50 SHA-256: c6d940667fedb2580b3d3875df1cf26d0c4989851069ae77b220a3e37a0bc51d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve as lures to external malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://smidgel.ru/uplcv?utm_term=chris+colfer+related+to+eoin+colfer PDF link annotation
- https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/3eoh28dbidb8gt3l00qucq77b0/6405913060.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f2cba6b04fa---bogadotarewisuxuken.pdfIn PDF document text
- https://coopinproject.eu/ckfinder/userfiles/files/8706640985.pdfIn PDF document text
- https://chambredhotes-savoie.com/ckfinder/userfiles/files/38366000712.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5bui2cqm61fdg4p82v6fb9fef3/ridodan.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/040811282141.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5ffa5b63d1---wapif.pdfIn PDF document text
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/airovo64b1vh8ad5klt57bu3d0/4186566739.pdfIn PDF document text
- https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/88576c2e5ea8faaaffee3086bde12458/32808047588.pdfIn PDF document text
- http://denkobarbell.com/_upload/files/25211896656.pdfIn PDF document text
- https://polandpools.com/contents//files/91700027071.pdfIn PDF document text
- http://billedbutikken.dk/articlefiles/file/povakezepezofapibagapegil.pdfIn PDF document text
- http://loaamtran.vn/files/usersfiles/files/tazuzafopututosabinojur.pdfIn PDF document text
- http://dolphinegypt.net/userfiles/file/97257302141.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104ab3fa9122---75498262071.pdfIn PDF document text
- https://avonsteel.com/UserFiles/file/56250649409.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c914c27ca00---merikuvijolibadasojopi.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf686d8f2d---gizipexotupogewulijin.pdfIn PDF document text
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/dqi1m55iabr1hmhjpreuhsrik8/4802519781.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f122dd8167a---72574814468.pdfIn PDF document text
- https://mldom.xyz/web/img/podborky/files/73568781477.pdfIn PDF document text
- http://chothuexeninhbinh.net/data/dulieu/files/kigoge.pdfIn PDF document text
- http://tiendanatacion.com/noticias/files/6227482385.pdfIn PDF document text
- https://alternatifhirdavat.com/upload/ckfinder/files/56524788320.pdfIn PDF document text
- https://store-connector.com/_upload_bilder/_filemanager/file/22860964393.pdfIn PDF document text
- https://bozoklar.org/ckfinder/userfiles/files/74397927637.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_off0000ec05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC05	10604 bytes
SHA-256: `baa809e22de3ad160b3d86ad7d0ed63682050bebd03c4f6c05a9796de3e7c564`
`font_01_sfnt_off00010435.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10435	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011c47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C47	19128 bytes
SHA-256: `bd8981b53752723d92b6de589de5f60f0757ba80f182b8731fcc32ebe228ce8d`

Open this report in the interactive analyzer, or submit your own file for analysis.