PDF malware analysis — malicious · b87752e45369d88d

MALICIOUS

PDF

82.1 KB Created: 2021-09-22 11:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 92affae80c81f5dc1580661316b8bc36 SHA-1: fbc1ea3bb00ca705e4eba51330a09fdfefddd0aa SHA-256: b87752e45369d88d0700eabb30c586c2d22db8d5583f8efa603301a5217d22f1

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to potentially malicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/34704565543.pdf In PDF document text
- http://festacreativita.org/userfiles/file/jurimufux.pdfIn PDF document text
- https://perfecthospital.org/ckfinder/userfiles/files/nagabafigibesa.pdfIn PDF document text
- http://lrm.mcdonalds.ua/ckfinder/userfiles/files/78939910876.pdfIn PDF document text
- http://jcbcharpentebois.com/ressource/site-image/files/pejojev.pdfIn PDF document text
- http://clubsahdianagalati.ro/upload/editor/file/2119762229.pdfIn PDF document text
- http://itagqatar.zajeltel.com/itag/file/files/750227442.pdfIn PDF document text
- http://chip-chup.hu/upload/file/53393572469.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/48668853773.pdfIn PDF document text
- https://jin-hung.com/userfiles/file/najijoxa.pdfIn PDF document text
- http://cameranichietsu.com/luutru/files/xikovaxi.pdfIn PDF document text
- http://nicolalazzarotto.com/userfiles/files/gonigebupufeseso.pdfIn PDF document text
- http://chipublichouse.com/ckfinder/userfiles/files/59446225741.pdfIn PDF document text
- http://atsrealtyvietnam.com/upload/files/tanomamajuwegivaxu.pdfIn PDF document text
- http://romengo.com/ckfinder/userfiles/files/79674146864.pdfIn PDF document text
- https://812423.qqtogeljackpot2.com/contents/files/99086960164.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140a5d66be06---86974065655.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5c2499f09b4d285b8d4d3b57a73987cd/folazapuzemexumipalikosag.pdfIn PDF document text
- https://ddtoyz.com/ckfinder/userfiles/files/34096781059.pdfIn PDF document text
- https://liur-krd.ru/userfiles/file/jiguvijodofukutagidako.pdfIn PDF document text
- http://nusratali.com/userfiles/files/59850544841.pdfIn PDF document text
- http://ecole-belair.com/ecole/file/85117791315.pdfIn PDF document text
- http://knowleangling.co.uk/ckfinder/userfiles/files/31748478877.pdfIn PDF document text
- http://littlepearlbooks.in/data/eimages/file/madif.pdfIn PDF document text
- http://ranaghatpchsschool.org/userfiles/file/1779642706.pdfIn PDF document text
- https://dusunceokulu.net/resimler/files/79804073565.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=game+ppsspp+kamen+rider+super+climax+heroesPDF 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_off0000d56a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD56A	11012 bytes
SHA-256: `c9adba11279160e88db515303dc3250d07c76f5bd51de28064e75b2461a95722`
`font_01_sfnt_off0000eeca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEECA	19852 bytes
SHA-256: `005a98a4a437d8eb4671a78dbe6260ba65111f1f1a9abb43f29bbb672c0d2fd4`
`font_02_sfnt_off000121fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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