PDF malware analysis — malicious · 61338aa00f59129c

MALICIOUS

PDF

80.3 KB Created: 2021-09-23 05:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2f5cf6e629625eb7ec778846f69e210a SHA-1: fb5e953503e7ff0ccce21b339b191d10e2516f04 SHA-256: 61338aa00f59129c17517cbf83c9ec1d9b31179faeeb4908fd8c6d1affb6252a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme to deliver malicious content. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://cructi.ru/uplcv?utm_term=free+roms+psp+gta+vice+city PDF link annotation
- https://pchome.uzai.ca/upload/files/dupakipaxotugoduzomar.pdfIn PDF document text
- http://khautrangkhangviet.com/upload/img/files/zaroxobinobatobezuvo.pdfIn PDF document text
- https://nhahangphongcanh.com/uploads/files/jazusuvudolino.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9a7d476c1b336177859570f731285cfc/guzimirepumoninivatopan.pdfIn PDF document text
- https://tjp2-hotlink-j3t.com/contents/files/xofewolazovufurava.pdfIn PDF document text
- http://yameitecl.com/ckfinder/userfiles/files/20210918_195922.pdfIn PDF document text
- http://methese.com/upload/files/58184597499.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7985cc7c9---58663314510.pdfIn PDF document text
- https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/dinunewifarono.pdfIn PDF document text
- http://geluidsadviesnederland.nl/ckfinder/userfiles/files/dameruwevagefawakonogo.pdfIn PDF document text
- http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/181459591805.pdfIn PDF document text
- http://vigova.com/Images_upload/files/89021932318.pdfIn PDF document text
- https://regiefranchet.fr/userfiles/files/89384470008.pdfIn PDF document text
- https://dolnoslaskialarmsmogowy.pl/imgturysta/files/nudipetudatajanom.pdfIn PDF document text
- http://ruresept.ru/files/file/65173928651.pdfIn PDF document text
- https://sikanderajam.com/Robinson/ckfinder/userfiles/files/87321068345.pdfIn PDF document text
- http://agriturismocorteerbatici.it/userfiles/files/28484464130.pdfIn PDF document text
- http://ed-web.cz/userfilesfile/6765224983.pdfIn PDF document text
- http://orsini-blasioli.it/userfiles/files/50350695457.pdfIn PDF document text
- http://zjgjqmr.com/v15/Upload/file/20219141643247074.pdfIn PDF document text
- https://longhoang.vn/upload/files/58881144218.pdfIn PDF document text
- https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/14385372457.pdfIn PDF document text
- https://siroyensao.com/upload/files/23102461044.pdfIn PDF document text
- http://njbeihang.com/uploadfile/file///2021090117380445.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_off0000d314.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD314	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB26	18388 bytes
SHA-256: `350b7b5b7892236bb98132006a8929b63e963457042d4cd32d96e17c4d2fb3c5`
`font_02_sfnt_off00011ab0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AB0	10724 bytes
SHA-256: `b74098f7e053edeb3b3e68b5d907c24cb00c00e32ce804744dcecb22c1822802`

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