Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b73213fe0e20cb9…

MALICIOUS

PDF

74.2 KB Created: 2021-07-08 04:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5970b3b8d1e5f4f464083c1ff5411990 SHA-1: 1ff8b8f640fe0efe64a4433a2b04a269128aa29e SHA-256: 6b73213fe0e20cb9b70c6006cb84351a362c50327b2f4cc6bf8fa7a20442c2c0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to obscure the ultimate destination or host malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/hjev1tin6lds1ssncp208gn6m2/wekikobupafurekixubijut.pdf In PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078e3ee2e8e7---bidimivitamoborodudel.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/serovepozulatujivonow.pdfIn PDF document text
    • https://alutat.com/data/file/bobikizirekufotenug.pdfIn PDF document text
    • http://geose.ru/userfiles/file/fuminegax.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/34189403760.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a941a32dc---jibekusetafeduvineja.pdfIn PDF document text
    • http://07-3739589.com/CKEdit/upload/files/mosuzovokimijiwe.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/88403375454.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/af04c9af0b5838a6d7de0ce5be176175/69928315560.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210628025804.pdfIn PDF document text
    • https://promise-land.com/upload/file/59959778972.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609843f21506c---nemekafavezatukaliwasumo.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/gidajebozugup.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/51716674941.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nm8s15q2aot3rmn743d3e28vs9/sojepunutipekivorinez.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca0a20ffb7---gutavejodumimepiwapewojov.pdfIn PDF document text
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/87675263545.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mgvl9vt3kb6uhrqe343tlgt4v7/bogasopasaxinoral.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/vj2i2ckifdq45uh94bpp9f8v53/90569362791.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/16239719728.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608903cdd68b7---66637897341.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/81963568120.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/iktajkqp79g9q10a1g8ie523a1/42846858845.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=linear+function+answer+keyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#Referenced by PDF JavaScript
    • http://purl.org/dc/elements/1.1/Referenced by PDF JavaScript
    • http://ns.adobe.com/pdf/1.3/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/mm/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/rights/Referenced by PDF JavaScript
    • 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_off0000c2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F2 15860 bytes
SHA-256: 800a3b094b4cb89ceac33cfca5f7e8e22e6196f4355127e53570c68183d4ca25
font_01_sfnt_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 10632 bytes
SHA-256: 32b4badce5713d39c4e6a9d1530931a3e797010635ac00cec82f3200fd90ba93

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