PDF malware analysis — malicious · c015d42c0482e97f

MALICIOUS

PDF

88.8 KB Created: 2021-09-24 06:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: cad52c51f94d9f57716d2f5a7baf2b34 SHA-1: 682f6a617997045fde18878f8f6129d9779c0a78 SHA-256: c015d42c0482e97f5fabdca8aa3d00dd0ca653aca8edf510c85369300f78b003

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/3d4f5fe1d338ad51d002c4120dd3359e/dizegolin.pdf In PDF document text
- http://cukiernia-waltar.pl/qcms/userfiles/file/vilazopinurigiwoxi.pdfIn PDF document text
- http://odnoklassniki-files.ru/images/uploads/files/94031758746.pdfIn PDF document text
- https://castilloexterior.net/ckfinder/userfiles/files/99917869890.pdfIn PDF document text
- http://gallery4walls.com/upload/editer/file/kolojirifawemunidirelup.pdfIn PDF document text
- http://abcgsgeds.friendship-match.com/upload/files/57428560730.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614658ee39c6e---25208572769.pdfIn PDF document text
- https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/81386619259.pdfIn PDF document text
- https://taichielite.com/louis/taichi/ckfinder/userfiles/files/55965678130.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/jikololivoxenolezuledum.pdfIn PDF document text
- http://standardamulet.com/files/files/78570000750.pdfIn PDF document text
- http://dspec-car.com/js/upload/files/36148594524.pdfIn PDF document text
- https://rireenfrance.com/images/upload/files/29787720883.pdfIn PDF document text
- http://orkoien.com/userfiles/files/4176756983.pdfIn PDF document text
- https://anbc31.iscriptscloud.com/app/webroot/files/file/37758374421.pdfIn PDF document text
- https://sayurmateng.com/contents/files/58479355070.pdfIn PDF document text
- https://betenagro.com/sites/default/files/file/37903503850.pdfIn PDF document text
- https://flims.atelierleuthold.ch/userfiles/files/93418570639.pdfIn PDF document text
- https://aquatrustfina.com/userfiles/file/zukoxeropugot.pdfIn PDF document text
- http://kustari.net/userfiles/file/jupezos.pdfIn PDF document text
- http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/lefamomirodopazufa.pdfIn PDF document text
- http://czernavendeghaz.hu/admin1/file/xemolak.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=do+i+have+to+play+persona+4+before+5PDF 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_off0000f468.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF468	10988 bytes
SHA-256: `530a849a63440ce2f207f2f960df67dcd881a0ea77703f25fb45d56702b942b4`
`font_01_sfnt_off00010dc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DC7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000125d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125D9	18184 bytes
SHA-256: `c84f118d8cdbdd8150ffe6e062207a947385a2aa0a275cacb83b073df72ccff0`

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