PDF malware analysis — malicious · c984b43fb215206e

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 05:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 77b1e9448a227e7b95b506c295b35560 SHA-1: 6576bbfbb8e13ab8eec651577025c0d747224e1a SHA-256: c984b43fb215206ef10d706a8e9f69c834892857698a5be2660e59b6d5b3fd0d

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links and a heuristic firing for a 'download button' lure, indicating an attempt to trick the user into downloading a payload. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards exploitation for client execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://pistant.ru/uplcv?utm_term=forza+horizon+4+for+android+without+verification PDF link annotation
- https://shevtsov-art.com/uploads/files/43964224534.pdfIn PDF document text
- http://baschin-heizung.de/meineBilderAlbertGrundschule/file/92890537522.pdfIn PDF document text
- https://elperrocallejero.info/ckfinder/files/69538563906.pdfIn PDF document text
- https://chennothinterios.com/uploads/file/katusemalafa.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3491663f68bc34a23f3654aac2d9a773/49544144316.pdfIn PDF document text
- http://kojeneckezbozi.eu/userfiles/file/22157701788.pdfIn PDF document text
- https://xn--atpta-nfb.lv/images/userfiles/files/46166116578.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc3af68713---3300210907.pdfIn PDF document text
- http://3dtechgroup.com/uploads/image/files/31429560420.pdfIn PDF document text
- http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sadoresazukewepuno.pdfIn PDF document text
- http://pecsimutargygaleria.hu/files/file/36543526947.pdfIn PDF document text
- http://yuemeism.com/uploadfiles/files/25321410277.pdfIn PDF document text
- http://computerdoki.hu/user/file/rizadifujevutal.pdfIn PDF document text
- http://aytekinpolatel.com/image/files/61571775179.pdfIn PDF document text
- http://wxeina.com/userfiles/files/rewofikalog.pdfIn PDF document text
- http://studioingegneriavaragnolo.com/userfiles/files/kogilekutasubowevago.pdfIn PDF document text
- https://iphonerepairservice.nl/app/webroot/files/userfiles/files/jevexoko.pdfIn PDF document text
- https://ozmutludokum.com/userfiles/file/76349338302.pdfIn PDF document text
- http://synerfreight.com/syner_upload/images/files/kafarijukofifezetid.pdfIn PDF document text
- http://jlicentral.com/images/authors/file/29488445671.pdfIn PDF document text
- http://autoservizimensi.it/images/fck/file/58248150935.pdfIn PDF document text
- https://pfhotel.gr/ckfinder/userfiles/files/dagosevuxujuve.pdfIn PDF document text
- http://vnndt.com/Images_upload/files/rabonex.pdfIn PDF document text
- 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_off0000d3c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3C7	17720 bytes
SHA-256: `00dea65f4376505631437ad9e55e9e0e11992bda2e3b178d8497c2ef026ca71c`
`font_01_sfnt_off00010171.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10171	10724 bytes
SHA-256: `1b5717c296b051ea35a1928c93cb8e92b1923128ed05d90b21c5c9293e529a82`
`font_02_sfnt_off00011a27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A27	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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