Malicious PDF — malware analysis report

Static analysis result for SHA-256 1829d9fe5efeb271…

MALICIOUS

PDF

87.1 KB Created: 2021-09-19 21:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f8ca6d857a9ee24cc1ef89575141ea5 SHA-1: f669078fcf9fee8d4595feccbfaf061e68d5b67a SHA-256: 1829d9fe5efeb27183a8d56b9faafb824de6f89adeb79c743ab9ddb6c9ff171c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste content into a command-line interface, a common technique for executing malicious commands. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a distribution mechanism for further payloads or phishing content.

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e5813ae74---73224579923.pdf In PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///remele.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/39242791489.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/37291178948.pdfIn PDF document text
    • https://limsurempat.com/contents/files/buwesujulo.pdfIn PDF document text
    • http://storemisr.com/uploads/files/96412920021.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/86422671292.pdfIn PDF document text
    • http://weingut-suppan.at/files/20464262921.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbfc24c8e2---29425614501.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210918191106.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/zenulafubegez.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/96665611164.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/kojapokoruremarosekalusa.pdfIn PDF document text
    • http://runhouchem.com/upload/files/18614900953.pdfIn PDF document text
    • http://taigesw.com/upload/files/21159063655.pdfIn PDF document text
    • https://interconformity.ro/images/file/jupilonopubujiw.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/dfe50d4e9b5408c9b68b5d26c1662f76/tovuvovon.pdfIn PDF document text
    • http://videlec.be/ressource/file/zazafegobemavolafepewawum.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161469df180a6e---28033330961.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/tegarexejabida.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/pqqih43t601elk0n9jpuhpq24q/83944277590.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/luzuvuwowotaporo.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/81598500573.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/busovaziriboxisulazaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=iso+mounter+apkPDF link annotation
    • 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_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 18756 bytes
SHA-256: a6438dde3d7844ab462f3b80d08c7f0fbc1b26c6ced9fb863340b9d204ef16b4
font_01_sfnt_off00011e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E50 10420 bytes
SHA-256: 24c8bacedae0bac9a871925138743e257f67cf19b588b459749e4c3675cff12a
font_02_sfnt_off000135f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.