Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8404d391223a8a…

MALICIOUS

PDF

85.6 KB Created: 2021-07-03 00:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fe80c7efc989cfc781c5293526591dc0 SHA-1: fec807ef47c21c40e55ebe627e9fb2395ea44ca2 SHA-256: de8404d391223a8a1cb5bc3ca17544a7a63e873bafca8532c22137d2feac0977
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of a 'Password-protected archive lure' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. Numerous URLs pointing to potentially compromised websites or disposable hosting were extracted, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://laatjehuisweerstralen.nl/upload/file/jopulimix.pdf In PDF document text
    • http://ck-tct.ru/userfiles/file/96494726126.pdfIn PDF document text
    • http://chinalabware.ru/d/files/xamisejifofoloxidobufo.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac86fb0dfe5---buwukewagugebozepaxabe.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/bosedakunemudurisit.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/2bpljkh00akrfue9b8nvtf9p95/58395953398.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/supovigurevuw.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zikojudadizebiwapel.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/42993f4c8e443e2ac467e8b3763ffffc/sifolavexabusud.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c898bbea417---gulukevenis.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4de62cc9f.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/bdffc81734e1a652c3a0fd8eedd685df/bisawozubatiloziworase.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921fdab459c---53167263217.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d23bce1c16e---jakewazapimeveteg.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/68567292561.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608138d02b796---zuginipenewuzu.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/nojidagofafufabobolozaz.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/fowojivedixosewuxarazixol.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/litpg11i84ptteoo2qp86vna2t/78091973470.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3324c626---jaxufiwitewiku.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/fovigi.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/pazakevewawefaxevidikojaw.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/10824366932.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/e94addae1dfb1823c0ec01e3aed54b8a/kogonot.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/33b649e6fef940c2337872d882fcab3e/36522471515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=winrar+for+pc+free+download+full+versionPDF 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_off0000ea00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 10760 bytes
SHA-256: e3c7ccdfcdca513c3df5507e3297a993cd1f09b54b93060f6a829d0cedeceb92
font_02_sfnt_off00011af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF5 17032 bytes
SHA-256: bb954aefaee72fd70b5ba3ceb579dc2622c056e39b70caa5a583b7ea4062e035

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