PDF malware analysis — malicious · 69310f1d03974f3d

MALICIOUS

PDF

71.8 KB Created: 2021-09-18 10:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 59435d86f4e2a6f84cf5d8fb5a1a2a90 SHA-1: c3dd88acf03807b99d9f998b6662afdcfaa81d86 SHA-256: 69310f1d03974f3db4bba1c38449069a299088eaaa78419dddf62dad79ca2c79

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The presence of these elements strongly suggests the document is intended to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://garglob.ru/uplcv?utm_term=reward+free+robux PDF link annotation
- https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/nuzipuvelafudibivu.pdfIn PDF document text
- http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/39903893011.pdfIn PDF document text
- http://vattuxaydunghl.com/userfiles/file/kebegarogufezuxak.pdfIn PDF document text
- https://safewatersolutions.in/ckfinder/userfiles/files/fanijakezewufavaxuwexarug.pdfIn PDF document text
- https://eccdc.org/application/webroot/userfiles/file/20616568470.pdfIn PDF document text
- http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/sefemisimabub.pdfIn PDF document text
- http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/10637984372.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0b6dc2b16---8168172027.pdfIn PDF document text
- http://fedime.org/imagenes/sopogepoxifanazipexibeva.pdfIn PDF document text
- http://vistobrasil.net/uploads/file/10612921239.pdfIn PDF document text
- http://motivationandmomentum.net/ci/userfiles/files/vuvutupupofufajo.pdfIn PDF document text
- http://www.peritaonline.es/ckfinder/userfiles/files/xelarevalip.pdfIn PDF document text
- http://lnyuanzong.com/uploads/files/20210917095635.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/n2fdhd53v7ii80784pa096t0uv/wugavizaxikujipenel.pdfIn PDF document text
- http://jsdarvin.com/files/87262148656.pdfIn PDF document text
- https://apoiotelecom.com/imagens/img_fckeditor/file/toxalazogusoneseniwomete.pdfIn PDF document text
- https://rajatotogroup3.com/contents/files/xalefiguzejesapulolapuvif.pdfIn PDF document text
- http://remont-etalon.ru/upload/files/pezajagofi.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d744aba955bfbee8ab7a3b50f8151725/ragowetufurakedox.pdfIn PDF document text
- https://garnet-medical.com/userfiles/files/visalojit.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-9/file/kodilum.pdfIn PDF document text
- http://saringkarnwood.com/UserFiles/file/zaxubedejimofi.pdfIn PDF document text
- http://learningkey.org/userfiles/sokuxogilibekutu.pdfIn PDF document text
- https://simorgh.it/uploads/file/muvudiw.pdfIn PDF document text
- https://whitesal.com/data/images/file/1403_20210910193246.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_off0000b867.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB867	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d07e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD07E	10312 bytes
SHA-256: `e6f36df0f80a9edef044cd904c0b5ae346c84f1d8e9976e15cb19b5adf455e58`
`font_02_sfnt_off0000e7e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7E5	16220 bytes
SHA-256: `81f9744a1b1f4eb8f9e5fddbbcc475cd172041193c5dee75b84ec476bf3d6004`

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