PDF malware analysis — malicious · e2426ca86fa28e39

MALICIOUS

PDF

71.8 KB Created: 2021-06-04 20:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 39a7b58c692b8c1d4eb1c5a08b13f1f3 SHA-1: fd3a27472686b1b6ead5f35e2398166dc6052b1a SHA-256: e2426ca86fa28e3917530c0d044ded8cb2a4114c9f4cbad28185aa0a621b4834

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content or downloads. The presence of 'utm_term' parameters in some URLs indicates an attempt at SEO manipulation to attract unsuspecting users searching for software like 'ibis paint x'.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
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.
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://medvor.ru/uplcv?utm_term=ibis+paint+x+download+pc+windows PDF link annotation
- http://beiwendq.com//data/attachment/file/meripuzaje.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/3029dhqkhnfnjdo4kehrj5fke7/30693176856.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4ee32de6e549ef861e5c44267e798360/84897370209.pdfIn PDF document text
- https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/1fc49887624ea988dd0a3170b21e6838/sesusijivuvatefezewogetix.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d21e010a1e760ed317af5cec74974c69/nopabogikusipege.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/d11mieghr6djm3l49nnkue2f0c/89579058838.pdfIn PDF document text
- http://jucal.es/images/file/ferezigoweb.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/5b8572fc50b6ae78b827ff79ed5029f4/43165356938.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4dd4cd3240b7a907da909ab2349a1eca/19362277398.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/0bebd8ee9a9201584d8ee1b858b20eb9/83092238930.pdfIn PDF document text
- http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/goponogupaguma.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717e6a1c7f5---16682372495.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4f70511829b3ae5c04d468a25bd6b074/vukazinusovuzitajumivabu.pdfIn PDF document text
- http://architettoseneca.com/userfiles/files/47118448318.pdfIn PDF document text
- https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/4ld14c0g0op5res4mtiskmvse8/43116090020.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc075580d9---46163459262.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160906f5fdfb1b---sutujirewe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1EB	4880 bytes
SHA-256: `0afe1c00c63f4f3f3203b28d62eb266a824109833b805c212e7e8f8e0143eb2a`
`font_01_sfnt_off0000e286.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE286	9988 bytes
SHA-256: `bb057c38d1b35bd45ff15930335254aded9366ad0ef607fd00df273cc52946bc`
`font_02_sfnt_off00010468.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10468	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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