Malicious PDF — malware analysis report

Static analysis result for SHA-256 b140a7e2a3569860…

MALICIOUS

PDF

83.2 KB Created: 2021-09-10 21:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 736ea62b600191d67bfc733ca342bcc8 SHA-1: 6f22f782235ae7dde66f4ec92cd590a47a284982 SHA-256: b140a7e2a35698608cf4124149af5d73543daaf5ab610be01ea48321b6eea011
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML_NYX_PDF_MALICIOUS and ClamAV, indicating malicious intent. The critical SE_SECRET_RECOVERY_LURE heuristic suggests the document is designed to trick users into revealing sensitive information like recovery phrases or private keys. The numerous embedded URLs point to various hosting locations, including compromised WordPress sites, likely serving as download or redirection points for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://garglob.ru/uplcv?utm_term=download+roblox+hack+apk+robux PDF link annotation
    • https://mondoaudio.it/img/uploaded/file/65174318868.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/bejas.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/76165084614.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/zotabazevenalakitaj.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/degijewopovukisidipebati.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/jokelogame.pdfIn PDF document text
    • http://budka39.ru/files/pesufuredokugezomepup.pdfIn PDF document text
    • https://produse-zilan.ro/files/padusi.pdfIn PDF document text
    • http://davobio.com/upload/files/70945368270.pdfIn PDF document text
    • http://dalaichau.com/files/nesemoxilagaj.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/83799954571.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613051bedff60---xulufeve.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/vodubebinojabum.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/50049665824.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613173c77c111---powalevezifamivawasonog.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/bojukaxufoferemisabu.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/winisesin.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/18656715686.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/98666020160.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/lisebubafagakamokukewokaw.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316bf8cbcd1---gagovafawosas.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136ba55b395a---9230426141.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/19421851467.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/jezojetan.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/42116743849.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.

FilenameKindSourceSize
font_00_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 18228 bytes
SHA-256: 80515614bc78673eeb1c0e56ea971045ab626fb06ed390072536a836a62f2e8d
font_01_sfnt_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 10640 bytes
SHA-256: 75ca76fbb6d3afa8b4a73107e425fa7b7e9d99d92ae36a95707375083f60e01e
font_02_sfnt_off000126a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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