PDF malware analysis — malicious · 29e33bab05e53fbe

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 11:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 141dc54b1eecd57e142cb90b42658afc SHA-1: a064ba829ccb7815e9c4c0f5e3f75c24ca0977b8 SHA-256: 29e33bab05e53fbeee0c6b564b61170581f2c5f781b860e2543920b562efd3df

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, suggesting an attempt to obscure the final destination or distribute payloads across multiple sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://n-vv.dk/userfiles/file/79685042391.pdf In PDF document text
- http://piri-piri.pl/ckfinder/userfiles/files/80099052727.pdfIn PDF document text
- http://another-partner.morefriendship.com/upload/files/24368630719.pdfIn PDF document text
- https://shunnasato.com/53365706453.pdfIn PDF document text
- http://iscyber.com/userfiles/files/42536489923.pdfIn PDF document text
- https://tspinstruments.com/cache/fck_files/file/6010630135.pdfIn PDF document text
- https://lochoanggia.com/upload/files/76487311317.pdfIn PDF document text
- https://mlbcsimleague.com/ckfinder/userfiles/files/85549859463.pdfIn PDF document text
- http://libron.pl/fckupload/assets/file/vamofag.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebf997babc---24717094586.pdfIn PDF document text
- http://koyomisushi.com/uploads/files/tapusutozazalesobetux.pdfIn PDF document text
- http://mundori.com/js/ckfinder/userfiles/files/46178820378.pdfIn PDF document text
- http://ahrestygz.com/userfiles/files/20210918_094411.pdfIn PDF document text
- https://salvatoredivilio.it/userfiles/file/47185248177.pdfIn PDF document text
- http://www.companyforte.com/imagenes/editor/file/neleguzagoburedajibepe.pdfIn PDF document text
- http://www.vandiestbrandstoffen.be/uploads/files/kazenanexunabiwutixif.pdfIn PDF document text
- http://movesearchesuk.com/userfiles/file/61719517195.pdfIn PDF document text
- http://daydeothe.vn/rich_editor/file/21848623581.pdfIn PDF document text
- http://uptindia.com/newsimages/file///jibitapokivope.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/cb86d2fd1755a18c30620549af73409b/moporadorikakaka.pdfIn PDF document text
- https://tanhoaphat.vn/userfiles/file/46799851730.pdfIn PDF document text
- http://voyagevietnamlaos.com/hinhanh/file/kadigelarotu.pdfIn PDF document text
- https://rimsball.com/ckfinder/userfiles/files/76406154729.pdfIn PDF document text
- http://uforoi.com/app/webroot/uploads/files/33236822637.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=positive+descriptive+words+that+start+with+cPDF 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_off0000dc45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC45	10616 bytes
SHA-256: `198b7ce6b3d059d1276df9b45ce7b048e3c88f7fcea0e250c239e71e158355fd`
`font_01_sfnt_off0000f4c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4C8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010cda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CDA	17264 bytes
SHA-256: `78c215e2e4e117cab3d0898e49d4cfa6a76ef25d4b5e6dddfc72049a7c847c23`

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