Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b1e0d7eb173bfe…

MALICIOUS

PDF

104.3 KB Created: 2021-06-27 10:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7d20907533d96d669b825a813ccad89f SHA-1: d87c56e30c41a4d7749a33c04d83fc2048d569f7 SHA-256: 65b1e0d7eb173bfea64f3ce978930de3e1615f75cc3dfce7162e7df766a8162a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=reading+comprehension+on+health+and+fitness+pdf PDF link annotation
    • http://entryexpress.online/chapter_images/files/89489143350.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/nurabamamuxonexijoze.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/99164878834.pdfIn PDF document text
    • http://fructusartis.com/i/File/bopapilinewoxivudo.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16086b634e164b---romonoxurowozabukozena.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878a9881a7d---boxesebibifoketes.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf40ac89146---39686512197.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5ab751cf335ab73ca6294b6931bc195a/rusezetujuwubufitod.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/bfpgs15aem0hp69uv3geg83fqg/71687203484.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5d14dd780---gugefipuzifas.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/moxepek.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/26979120855.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762276b0254---fapavegopu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff00b521b4---xokemupu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/hnj21phgvgo9rqhb5stlfuluku/senituvuf.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/glidgp1s8su9se5h4597g30peu/vezidedasaragajezire.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/22355676307.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881a9b80d85---risamaduzuwofes.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/43838100668.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb6a3fcb8---jemilig.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859a143a0e6---7715850817.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/guvizoferita.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/pijojaporijodulano.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c6051e789---71240331595.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 2028 bytes
SHA-256: af57a0d606d831289d6b859cf905b5483be5a46938493a1ece8748fd0f4be035
font_01_sfnt_off00010f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 16480 bytes
SHA-256: ba515772da98ded9d3dfa0fbedc38e703673f4a0f03fdf3f67ca19ca9601909a
font_02_sfnt_off00012635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12635 11112 bytes
SHA-256: 71fe75ddc53d3039863a0d2762787fb3611a6f767f408c87430f1ccad6de1b6e
font_03_sfnt_off00013fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA8 22240 bytes
SHA-256: f4f00ffb252f956c6bf321a2133de3f5cde0a08e2e2824c13b9cf6e65f8e4512
font_04_sfnt_off00017a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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