Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de99594b662cd64…

MALICIOUS

PDF

131.8 KB Created: 2021-06-21 17:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-29
MD5: 09add0699edd6ab247da7a7de4155b7e SHA-1: 79b51d7e82945044cc761c1f088d011b4c9e4d36 SHA-256: 4de99594b662cd640766906f96510a5532418228f162f37482fc26d132aef1c3
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b884edc68---7837434745.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e42a0a1e9---75822774008.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4b44e4ff---ruluxipitituxujuza.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/fadakipewim.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6d6ae3fbc---xewip.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/amuhm1o4dkflfpu1fifmgv8pd5/buruvuvujaj.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/40223112027.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/roa5lm4ms066p6bkq44jqdk8fo/pokazagurapebeb.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210518211209.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/44n6r7377naj1lo6eok96o0e55/36911174035.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16083e43e93b25---5007897052.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/45236694562.pdfIn PDF document text
    • http://talleresjpg.es/img/file/tujujoz.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/92727772946.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/dazexarejeru.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6ec56f1addfa05c3e49e583ff5006348/larob.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00015317.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00015317.bin)
    • http://fedorahosted.org/lohitIn extracted file (font_05_sfnt_off0001ccdd.bin)
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=kamakhya+tantra+in+bengali+pdf+free+downloadPDF 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 extracted file (font_01_sfnt_off00015317.bin)
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn extracted file (font_02_sfnt_off00016640.bin)
    • http://www.gnu.org/copyleft/gpl.htmRegularIn extracted file (font_02_sfnt_off00016640.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_04_sfnt_off0001b788.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_04_sfnt_off0001b788.bin)

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14799 3212 bytes
SHA-256: d9c0a8ab968be60eeae79898da3d45d40692608b0848a70543de12d7c70dbe36
font_01_sfnt_off00015317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15317 5644 bytes
SHA-256: bcb8d21136f12df50a48ec002134c1a978f3691bd43cf93937e812fa23ad4146
font_02_sfnt_off00016640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16640 10764 bytes
SHA-256: 469a33a2da64597263582dcab33a337026728e7ca88c3af8249066c484ffca48
font_03_sfnt_off00018792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18792 15484 bytes
SHA-256: 854ae201e831e8b6e764463a79de9967dfb9ec2887c777eb1fe8206d1eaf68d0
font_04_sfnt_off0001b788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B788 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
font_05_sfnt_off0001ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCDD 12228 bytes
SHA-256: e2e66f355e3e82dc0a7e4538262726bde6fadc9bb081b50e4db5cda8e7bbce75
font_06_sfnt_off0001f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F365 2952 bytes
SHA-256: a9bf60956f919a362fdb587d6cf34b264e34c271ddd24a9592301e262034e891