Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddb3f6fc581e124…

MALICIOUS

PDF

84.3 KB Created: 2021-10-04 21:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: 51ba1b754fce62cf8144a16ae656ee6b SHA-1: 8042047b0150bd36de9c35cea964abc0b6165d71 SHA-256: 3ddb3f6fc581e1248902395b46208a48de01cd28d749db1f3ad75c1c09429190
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/39e9a37230ffebc6f4754272e6f8a12c/64326379885.pdf In PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/f7575dc6e8b477b7ce742456b46dc414/vokewofenolorivonirewubi.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614d3965c4892---8844465771.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210911_B4C507D1B94745CF.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/19186743934.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/57617483046.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/40544345888.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/sujuget.pdfIn PDF document text
    • https://ckv-siemreap.org/ckfinder/userfiles/files/juterizesol.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/2254399793.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/97969152494.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/nusimepibiwonakigibusavo.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/48193752085.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/19366856317.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/nabugimebirix.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/82884708457.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/41202576842.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210916032703.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29946538613.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/rajipaliw.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/xedufuzutolugizaxe.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/54463232395.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/167539069.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161433e3cee6b7---30588161225.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/sagisosavijutotexirezuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=be+ye+hearers+and+doers+of+the+wordPDF 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_off0000df8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 20032 bytes
SHA-256: f786206d11e0e0a0de0ffca4ff5a3affd2cc7c1cfacdf212d087fd79f5910865
font_01_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B16 10564 bytes
SHA-256: 3e9dc873d25dec74e766fc14df0018a0e2a3e5e0c3544251e046bad10db0b3a1