Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939cadef87de462…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 12:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: a13fbe39ee816432a73644a2ed540bb4 SHA-1: f59e4e57e25c735297d1a47369c9f46858f70d90 SHA-256: 7939cadef87de4627ea8086b73c5237f7523e70558d586b7a3f849aa05ca7e71
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210910015206.pdf In PDF document text
    • http://osmed.cz/app/webroot/files/files/gijolusamipejunudel.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/zexeke.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/diput.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613bea6d97655---bokefijexuri.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/bowixelid.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/12355695713.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/rebobawoxobabekaku.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/semikopujadosizubo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f555feb9e1e0a4329d816a029b72723f/15088939843.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/4375903064.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/93955964703.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394459c783a---kawebazo.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/vofanijugutav.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/nilepumetezixa.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/xexofalatudikaki.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/70083180519.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/tatewapujizuwipi.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/50265361966.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/25381483051.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/foseguxuxepadevaxuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=novia+virtual+androidPDF 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_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 10084 bytes
SHA-256: 07d246ef5d9280434442ffa9d8d8e02de9372ac94cba309e2d9b38105ba32bb3
font_01_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 18372 bytes
SHA-256: 703fe9309409fd47b8f1ec69425469147eabdc80260042fcb35acd0cc7ce2c3b
font_02_sfnt_off00012a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1