PDF malware analysis — malicious · d7d328a8a1fa0660

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 15:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 54757c9448dee07bcc35bb376662dc72 SHA-1: 7878544cce78d74956e74baceef373ed8864299c SHA-256: d7d328a8a1fa0660a47080e54610a064204c506be6918d5ad770c7767175fe8c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The PDF structure and embedded URLs indicate it's designed to redirect users to external malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=magic+quadrant+for+intelligent+business+process+management+suites+2017+pdf PDF link annotation
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d90d89fb8---53285780508.pdfIn PDF document text
- http://studiotecnicobergamaschi.it/userfiles/files/kedenilapelixogu.pdfIn PDF document text
- http://amexeuro.com/an3_Uploads/file/pumeruta.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67e8635fcd---32590624603.pdfIn PDF document text
- https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/naregisovigegafudulak.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097d0e5ef8e6---ridepipevewegifetelel.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/b6e24f425f4d0f3b566c02849bcd0531/muxakabuked.pdfIn PDF document text
- http://luxlustry.ru/img/upload/xuxulinofo.pdfIn PDF document text
- http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb36f2162d---9148131914.pdfIn PDF document text
- https://tonwen.org/userfiles/file/42542648583.pdfIn PDF document text
- https://liniagdanskzydowo.pl/files/midiboxexefagolom.pdfIn PDF document text
- https://pacpartner.net/images_client//imagesfile/36918751716.pdfIn PDF document text
- http://broadmoor77.com/clients/39738/File/vorazepugat.pdfIn PDF document text
- https://fereshtegan.net/basefile/fereshtegannet/files/putekopejilesigi.pdfIn PDF document text
- http://umiyawoodworks.com/fckdb/userfiles/file/1439582002.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108fd1d2c08b---gigur.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/37884264980.pdfIn PDF document text
- https://aydin-elektrik.com/resimler/files/94146640127.pdfIn PDF document text
- https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a3890a880269b6a6a68f2671e4874b04/19131579265.pdfIn PDF document text
- http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/76255952901.pdfIn PDF document text
- http://fkhd.cz/data/img/3509031523.pdfIn PDF document text
- http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07180873c---26927410754.pdfIn PDF document text
- https://gamma-electronics-eg.com/userfiles/files/30517815000.pdfIn PDF document text
- http://www.tamtrebinhminh.com/public/files/55521190593.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_off0000dcf6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCF6	11684 bytes
SHA-256: `8f1f9287ccdfbe917da70abb1cbf531b60e894eb6a1cb7a7c0d2ffd5710c478a`
`font_01_sfnt_off0000f837.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF837	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011049.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11049	16804 bytes
SHA-256: `283b9bbc7e014ba171ff112c5c8e11841c554874ac673dbb9c86f1273ad0f11f`

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