PDF malware analysis — malicious · 77e5519d565ae7e6

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 16:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: bbb85cb163ba251a24b0cb0d66239664 SHA-1: b9e0018c2c41a906164d9d8c9f78e4a7cefd3a88 SHA-256: 77e5519d565ae7e6ba29ab021d580fddf8945a2dc2bd10bf1890793f7af4252d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document is designed to trick users into downloading a password-protected archive, a common tactic for evading gateway security. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt, likely involving a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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 http://peknanevesta.sk/media/file/63131571579.pdf In PDF document text
- http://recko.ru/ckfinder/userfiles/files/88753383416.pdfIn PDF document text
- http://meuble-tunisie.com/userfiles/file/53259844904.pdfIn PDF document text
- http://ilovehikari.com/uploads/files/ruwugibexoga.pdfIn PDF document text
- https://umartravel.com/files/81407538190.pdfIn PDF document text
- https://kitapkaplama.com/upload/ckfinder/files/35106510696.pdfIn PDF document text
- https://metnar.pl/web/uploads/files/mibatapovuzoxitikerife.pdfIn PDF document text
- http://silesiacapital.eu/data/file/xupezizemefamolasira.pdfIn PDF document text
- https://rugerwafers.com/demo/ruger/beta/userfiles/files/33617226501.pdfIn PDF document text
- https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/tegosob.pdfIn PDF document text
- http://soundspace.eu/Upload/file/24345179721.pdfIn PDF document text
- https://hotel-la-licorne.fr/userfiles/file/17184256586.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16130113e3d603---nelibixalewiwerax.pdfIn PDF document text
- https://zenit-npk.ru/files/file/20657479812.pdfIn PDF document text
- https://grdr.org/paidel/ckfinder/userfiles/files/bibazekotuwufibemopu.pdfIn PDF document text
- http://www.vikingmaterials.com/img/23216731317.pdfIn PDF document text
- https://yogaspotny.com/userfiles/file/nivodudepu.pdfIn PDF document text
- http://dietaltop.com/userfiles/files/wesiwopatorenomebiwowabox.pdfIn PDF document text
- https://wroclawmodelshow.pl/ckfinder/userfiles/files/tirogisavivuti.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138eb9d5c273---46883150563.pdfIn PDF document text
- http://ottomaniantextile.com/userfiles/file/raropitusi.pdfIn PDF document text
- http://designgaleria.hu/userfiles/file/lonevomagobag.pdfIn PDF document text
- http://arabstina.com/ckfinder/userfiles/files/40597255964.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+break+a+pin+lock+in+androidPDF 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_off0000da7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA7E	18664 bytes
SHA-256: `d65cb0b2eda5749efe697d22b898f406eaec0b14a477077a286c1108331dcadb`
`font_01_sfnt_off00010ae7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AE7	10648 bytes
SHA-256: `d2483c19de3e3d0b50c91333152183edd38bc0d03cf68baeea8df16133e5abb6`
`font_02_sfnt_off0001232e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1232E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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