PDF malware analysis — malicious · a29fab00b26ba90c

MALICIOUS

PDF

72.3 KB Created: 2021-09-24 14:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: beac83465e01f7f0583b3c88e52fcc7a SHA-1: bf7d1ce8d5aa0e5d641e7c7f0e09f4f802a0bfce SHA-256: a29fab00b26ba90c7f1986849fce64f8cd2c4d2a9bf25c75b6909321e66b32cf

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of external links, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 http://tsrmvolontari.it/userfiles/files/30466861948.pdf In PDF document text
- http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132c867df564---36382791718.pdfIn PDF document text
- https://theatresaucinema.fr/uploads/file/nitobofelides.pdfIn PDF document text
- http://sor1310.com/userfiles/file/sowifexibuwerelisefa.pdfIn PDF document text
- https://rainbowfurnitures.com/files/files/gexesuveg.pdfIn PDF document text
- http://ohana1bbq.com/uploads/files/rivuwijunerevawijirij.pdfIn PDF document text
- http://mexxeopaint.com/upload/files/fugupa.pdfIn PDF document text
- http://fipjp.com/userfiles/file/93933703658.pdfIn PDF document text
- http://izmirtavla.com/upload/file/tavuditugazezanur.pdfIn PDF document text
- http://big-blue-bus.com/pics/fotos/1/file/27739068031.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb61f448be---75521829063.pdfIn PDF document text
- http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/zixamivitevexobud.pdfIn PDF document text
- http://goodtraefarm.com/ckupload/files/logezenaxijuvufid.pdfIn PDF document text
- https://hunglivet.com/uploads/files/202109111525543654.pdfIn PDF document text
- https://mauspro.net/upload/files/fadavolesarogabibek.pdfIn PDF document text
- http://sungwoneng.com/upfile_editor/2021/files/pafavidoti.pdfIn PDF document text
- http://mwcapital.net/ckfinder/userfiles/files/20102889843.pdfIn PDF document text
- https://resttour.com/images/userfiles/files/5558917849.pdfIn PDF document text
- https://corpusbg.com/files/fck/file/noleva.pdfIn PDF document text
- http://faithleader.org/js/ckfinder/userfiles/files/lovefadejedujarekadanakan.pdfIn PDF document text
- http://hyeminshop.com/DATA/files/xepuganasigunumuva.pdfIn PDF document text
- http://moristas.com/userfiles/files/zuremumefupomotuvubeb.pdfIn PDF document text
- http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/34963250156.pdfIn PDF document text
- http://martonelektro.hu/files/file/302349742.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=elemental+evil+player%27s+companion+pdfPDF 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_off0000b4e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4E9	10980 bytes
SHA-256: `532053ec11b89a51e66a38626b8534b3b625d56448701f74d6d730b2725796d2`
`font_01_sfnt_off0000ce66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE66	17800 bytes
SHA-256: `96dfdc63d90d80cb2f38c2b01c8468c03a1bf00217f6b72bc7c8789fa2d027ee`
`font_02_sfnt_off0000fb32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB32	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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