Malicious PDF — malware analysis report

Static analysis result for SHA-256 be522b9da48a113d…

MALICIOUS

PDF

76.8 KB Created: 2021-07-25 16:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d37441f9b81ce1ff6116780f8919585d SHA-1: a7228ef904bb028fcd99d9b648c1987c4e30aa15 SHA-256: be522b9da48a113dc7d4e1014bb20aa64a8677c4ee9ce13ae1f4ddbe86c10ea9
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that contains embedded JavaScript and multiple external links, some of which point to compromised WordPress sites. The presence of a visual download button lure, combined with the ML classifier and ClamAV detection, strongly indicates a malicious intent to trick users into downloading a secondary payload. The embedded JavaScript likely facilitates the download and execution of this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.euro-fly.eu/userfiles/files/sodarizuxigofajizedowo.pdf In PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160941d096fb85---nojemurinez.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/38464095230.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/rawitadavi.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a001a50ff20---48937741051.pdfIn PDF document text
    • https://fobh.net/userfiles/files/nudupurelesorobalavujegun.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/84378830777.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/tozilanigilufowenogi.pdfIn PDF document text
    • http://novichiha.ru/pic/file/wuvazelogovubamaviloron.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/805b6c8962603c2ea6ae52b84d73d2a2/5549678178.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd55e403bb---45242400080.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc1f9765bb---miponusonikosa.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/39839837868.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/rojedofuxadofolelaruleved.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/mukavive.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607af614a5d1f---57120487800.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/22182733456.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210520102743_768397392.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/4912648410.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/nabulajomuselusavut.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/p9ogma7eit77vq1stk4l8ml7c7/bafumodejuxajadoxop.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/2285337591.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/sepemad.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a7a086e46fb1fbdcb023da2aeaaad5ac/pixitavogupasevilexeruj.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/99422010574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=rabb+da+radio+2+full+movie+download+hd+480pPDF 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_off0000c6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 11460 bytes
SHA-256: 043beb530767f5dec0db5b6a3bccdba8b9561baaecf39063e3d4dfb4d851237f
font_02_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 16416 bytes
SHA-256: e50c6b661d72732e5f31d78b824ed639347e6aa694efd1a505522bbbf683b252