PDF malware analysis — malicious · c582dbdda074bfd9

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 07:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: c95c66881ca13d0e43307f573993af71 SHA-1: 88868d01e0b61a4c1151d11a50ef1a147293fa3d SHA-256: c582dbdda074bfd95aa3c6850d06ac1e301a0e11e80a6b1904f054b73cb9640e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to potentially compromised or malicious domains, suggesting it acts as a lure or distribution point for further malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports its role in a phishing or spam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://capital-publishing.com/ckfinder/userfiles/files/sezapukegavutiki.pdf In PDF document text
- http://reutlinger.pl/userfiles/file/24115087385.pdfIn PDF document text
- https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136878b9f10d---momokeg.pdfIn PDF document text
- http://studiopassarotti.it/userfiles/files/zatezis.pdfIn PDF document text
- http://ayurvedicclinic.org/userfiles/file/18586000462.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161338310be884---13939866098.pdfIn PDF document text
- http://fructusartis.com/i/File/vafiro.pdfIn PDF document text
- http://biurod9.pl/public/userfiles/file/ruzalekeliladepiduk.pdfIn PDF document text
- http://thaimassagemodel.com/ckfinder/userfiles/files/56654353296.pdfIn PDF document text
- http://cck-brno.cz/ckfinder/userfiles/files/9302966328.pdfIn PDF document text
- http://ymjgolf.com/file_media/file_image/file/neditolewuvefago.pdfIn PDF document text
- http://tecniagua.es/uploads/ckfinder/files/wulaveniniwutakudib.pdfIn PDF document text
- https://remont-bez-zabot.ru/files/file/jetalipexojapexuwijug.pdfIn PDF document text
- https://andana.us/files/files/19056722845.pdfIn PDF document text
- https://foodsafebox.com/ckfinder/userfiles/files/54859985984.pdfIn PDF document text
- http://infinity8talents.com/userfiles/file/83250299578.pdfIn PDF document text
- https://gkia.org/kingkong/userfiles/files/dewubasasukulale.pdfIn PDF document text
- http://sartoriaventurini.com/userfiles/files/loxomizemibekoligafoxun.pdfIn PDF document text
- http://hferrynetworks.com/FileData/ckfinder/files/20210906_A9E9A5F48DE164DD.pdfIn PDF document text
- http://vinhthuan.vn/upload/files/duvolupedajepubumudisak.pdfIn PDF document text
- http://ventensis.lt/public/ckfinder/userfiles/files/sekumolelogojokon.pdfIn PDF document text
- https://fsbulletsandbrass.com/userfiles/files/3175484288.pdfIn PDF document text
- http://kidsjeodo.com/images/files/30296715509.pdfIn PDF document text
- http://koyomisushi.com/uploads/files/72200474462.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=free+gta+5+accounts+pcPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e2a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2A0	10620 bytes
SHA-256: `d53a1221c353d6b2db792fa62d5606ea0409eb813eac20aea171534efa4a21ba`
`font_01_sfnt_off0000fb19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB19	18396 bytes
SHA-256: `19c4e246c85a731d5f607190bc85831b3add10a09569615234f4c0c7029cb32a`
`font_02_sfnt_off00012a67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A67	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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