Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcb66c5300acf3f…

MALICIOUS

PDF

347.7 KB Created: 2021-12-27 06:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 784c5752dea2e6971e3b22d97aa3882f SHA-1: efb54118aac1597d3f8d0818cd33a7d6def39054 SHA-256: 1dcb66c5300acf3f76c237a1766bb4e31844ca0bc7b45e2bbe76d45e400f006b
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6933

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://infrive.ru/uplcv?utm_term=amadeus+software++pc In PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/40033212376.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16164f96dabdb6---78149592933.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/zaxejudag.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/56931856923.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/12419454451.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/91077846246.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/gebolujajopupexifek.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/puluzisu.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161a9895284488---tasobaxopisemumiwosoreweb.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/87165534012.pdfIn PDF document text
    • http://www.plan.msu.ac.th/ckfinder/userfiles/files/telopeseben.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/toxobifar.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133613dac966---jakisopulo.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/jorarogosimowurobud.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/89107966036.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/15np806htgjrvq7eihp1veo3nn/kasutidavemijoli.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/wewinaweba.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/7434099495.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/goputolatigagetus.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/25098031838.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/49920341065.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1619ee86859929---tinulewobutoraxuxexe.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/tarewiruxunas.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/5825279806.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_off0004faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAF2 10708 bytes
SHA-256: 1e884316bd728709c6fd54d4f6e14f8ee162d648049d792a1fdcf575232db471
font_01_sfnt_off000513ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513AC 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00052a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52A4B 21924 bytes
SHA-256: 7e200db2e5fa2760611fa3d73f3bf0201cfec47805b4aea2bb74ebd8c976e8eb