Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e31440ec6ca3e8e…

MALICIOUS

PDF

62.1 KB Created: 2021-06-19 15:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: eb2ca892f50c996131c82ebd49a3e2f3 SHA-1: 084319c6b2ce1ab0c161ad2106d20a6fb2a28097 SHA-256: 4e31440ec6ca3e8e41cac7efbaeec7f6995748d24416c52cac5445dacdcf066b
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vicotelecom.vn/static/source/images/file/memewal.pdf In PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/tugutu.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7afdbe5698fc2257c4cc0f6d82d71d01/56573354649.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085536ba74dc---joruzulugi.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/getidu.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d080529132---41825911275.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/59540c4663664195a08032329a4341c4/vogosukijenogadabotek.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/65816883559.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a22604080b8f1159cbb7aeea643fa958/25359249037.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/1a08932b9085feb3dc37b452e77258dc/norelosidoruxuxag.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160af918867c28---xosipu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866b26e71d6---75229913824.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/56406001078.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/nudomasewalijixarasekub.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ff9b4534179a8c5d6e1ade51346a788/87284112603.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021051504243273499.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160959b0026c93---50875309231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=if+in+cPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D6 4296 bytes
SHA-256: 68e8afaa20a8ef21d499a361347edcf7994bb76d078c5e317b856c8c8eee2b5d
font_01_sfnt_off0000c78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78D 11180 bytes
SHA-256: f4bd6602ef9b8ab9d43b6f721592e07a3f2de41e63728bc6b39c0c41785fdeac

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