Malicious PDF — malware analysis report

Static analysis result for SHA-256 192ce9599ea71787…

MALICIOUS

PDF

92.8 KB Created: 2021-07-17 05:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0e3030fcce1661959ba15eaa6f58f03e SHA-1: f9389eeb526ec24cab0fc87a4bc71be2aecbb3c3 SHA-256: 192ce9599ea7178796cb92a04bf1e8cd5e70678af369d7f25084ddbb9c85d675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecf5f984cd---ronipamiramas.pdf In PDF document text
    • http://residencecarlofelice.com/userfiles/files/nozulusodunipozepogarunok.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/pafilamekaligowejinifobik.pdfIn PDF document text
    • http://petrduchek.com/files/36054683772.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/1cc7d2f542806ec10133f95f69a62698/jeboratawimemenadil.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/9f132fd07c8664d52cc37fa412a031d6/simuva.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2dae77abc---89440150940.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/tanazugaxogesidafexufom.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cc382dfdc---fiditupopamosukopotiriti.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/6g30g9u167vemknc2cjparib81/49543450665.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/21294565569.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/66021933158.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609e95ac86700---puzagetefaf.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/78239303781.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/789cc6680e0a3e81cb82de28960be504/92792644206.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/11821817366.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081ef35691f7---52231130104.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/vinpna2assk1cb73sdghcgvaiq/vagipenojegofiregi.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/wojajunegekelofumoratal.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/533e3eca300576007b5f4cda1cf49c7e/47473572545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=tokyo+ghoul+live+action+movie+watch+online+english+subPDF 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_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 11136 bytes
SHA-256: 4eb6ab8dce102e5cf1277621fc46d95518bcc28c005592baa5262d47e6e17727
font_02_sfnt_off00013676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13676 17336 bytes
SHA-256: 7e9ec9f4f7a2b98d94f1f20a543a90889eed2da7eccca3455fc64b6c8c093827

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