Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ae76edbdf6fc95…

MALICIOUS

PDF

107.4 KB Created: 2021-07-05 15:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5f13dcb2a881d2a288737eceec61e2fe SHA-1: 8e2e6e0e18e2e890a5abc14720d409b626a43122 SHA-256: b2ae76edbdf6fc95126f5cae9b19f9a77df3e48dc76663e8e2156867d8741cc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://infrive.ru/uplcv?utm_term=tree+game+of+thrones PDF link annotation
    • http://www.prieteniitehnicii.ro/documente/file/vimujupevetuvik.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/beed4409251fc4fdec3dcef98e397019/rerufizukuwesexow.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/v09fut74gjifh8a8vvb2a7smhb/18357549828.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/87fb88f22ef86386f70fef04fe10b233/fufomilagelupa.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/46512753267.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/99542908330.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dbb27ea68---33900843550.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/0a00be49b9364b900bc21f07b2b0e66a/nipitimukujun.pdfIn PDF document text
    • http://18554080.com/userfiles/file/83733478991.pdfIn PDF document text
    • http://servmed.net/userfiles/file/51068852328.pdfIn PDF document text
    • https://asi-filter.pl/files/file/mekuvokaxunezazejapo.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/66234846280.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074a66db0c38---dusitosadafameponedufid.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec985857ff---wosometibatukokina.pdfIn PDF document text
    • http://change-sexy.com/files/files/midevibakaliselosej.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/gakolakelopaluxore.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/66ff8ec1f6da5e8a94544d9e93bdc829/11909774472.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/5rcmsnc0kfnsa4bfs7fd6b31fk/93235678892.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/43145847423.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/74782392065.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9f58ac2b---zodagigivimasi.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/dowezirujixir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15879 10488 bytes
SHA-256: 5425a319d33cf807af3dd3ec11766ef251aeeff142a663430b7e98738ad21abb
font_02_sfnt_off00017027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17027 18432 bytes
SHA-256: b66acd41a88ae3c8e0fa7f46d259ac95d0dec8b93b574963c38226ffd2cfea43

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