Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc52b4d62ba8656…

MALICIOUS

PDF

76.7 KB Created: 2022-04-02 05:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 5cba7ae3db89056aad349d8f328aa71b SHA-1: 39b857ee6caf6cc30bec26fd22723217cb8cbf76 SHA-256: 1dc52b4d62ba8656d1f63e3650242b872d72cc68bad562b0640541997321a030
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://colod.co.za/YmrXLWy8?keyword=reading%20comprehension%20worksheets%20grade%207%20pdf PDF link annotation
    • http://elt-tm.uz/kcfinder/upload/files/wuxojatumobiju.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/162312042a6831---94740124831.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16240a53112b1f---tikiridevozimogizanura.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/53677777055.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/kozanamal.pdfIn PDF document text
    • https://mufepubawitig.weebly.com/uploads/1/3/4/6/134614790/jaxewirozafezilez.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/162244c4be671d---23092800987.pdfIn PDF document text
    • http://www.varnamonarradio.se/admin/kcfinder/upload/files/zoludikubad.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/wojidarit.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5f740c50a70e3c5eb4d7da4388f6831b/zedij.pdfIn PDF document text
    • https://fijevomakikedu.weebly.com/uploads/1/3/0/7/130740050/0753a.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/73464996660.pdfIn PDF document text
    • https://nimujofo.weebly.com/uploads/1/3/4/4/134437385/74472875.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/44715976714.pdfIn PDF document text
    • http://online-editor.menu-card-maker.com/uploads/files/zunatukukizatasag.pdfIn PDF document text
    • https://tedamitaza.weebly.com/uploads/1/3/0/7/130740371/3a07da5f50b6fe.pdfIn PDF document text
    • https://retarabad.weebly.com/uploads/1/3/3/9/133997928/lelizuj.pdfIn PDF document text
    • https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/rotedofitabidibetut.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16207329da14b9---jeneferutiko.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/wadobuwuxifudi.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/51473032246.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/vuzalijiwemurig.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1622505af66a1e---mowugusuzujedeligugore.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_off0000c744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC744 11292 bytes
SHA-256: 1842ccba0594f4cdf56aec70dceb8a83a9aeb2dfbeea56ac88150e9458faaac0
font_01_sfnt_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 16080 bytes
SHA-256: 5fd4081629c6ec587bf01cf2ff1f4298f8e4c8d03035abe40d795d2b28110e1b
font_02_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1