Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54ed71736bad34a…

MALICIOUS

PDF

110.8 KB Created: 2021-08-12 19:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4833217227e8ee9c4777b7460c82595f SHA-1: 9953605baac82464d001fbca8a85239325e915d7 SHA-256: d54ed71736bad34a22d2e6727b71fd12f7e31552dc135934eaa4c56318459aae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the PDF being identified as a phishing trojan. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/a7c18a45c2969b5a7941761ae568e51a/59794036882.pdf In PDF document text
    • http://woodbridgeabw.com/uploads/files/75316509550.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/5392920119.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9e5acb86c---45366598808.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/31345364886.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/22659231545.pdfIn PDF document text
    • https://marigabung.com/contents//files/lugenezurelikilir.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107f9457dea9---fusadavurorusov.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/7848786746.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/gizezuxemixokefadujuge.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c058f94ee2c---jokuvazekomuweva.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160e8417dbb9f6---42399819899.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/50117230925.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/wogawowuwopomujunidevifel.pdfIn PDF document text
    • http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/witowusowolomozerizeroti.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e774e92b---92079852913.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/9fdb1829838a80c8266495bdb5a1b9be/97206895465.pdfIn PDF document text
    • https://lapakunited.com/contents//files/dakirimejiguv.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/xefibexibix.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/zetejiru.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ef08de1ba556e44a0ebe34f7316c9d51/nonekuxesuvupofipagezixi.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/51496789030.pdfIn PDF document text
    • https://agatanorek.com/files/file/tofopefuwoxajapateguto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=is+doctor+sleep+based+on+a+bookPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D51 10600 bytes
SHA-256: 04d6be4e48862950210c85d5a8833531714c241bbc315cfaf4e20575207c1333
font_01_sfnt_off0001656d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1656D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D7F 18308 bytes
SHA-256: a567fe50784075d6be01c6a2e4a01e73074ccec4750db4f8aa76eea73e90d508

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