Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a112b6ae54074be…

MALICIOUS

PDF

68.8 KB Created: 2021-10-01 07:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-31
MD5: f6305355ef5e9e7f9c2e4c971582254d SHA-1: b14320c336be32af54de3522fdd840014a0f44e8 SHA-256: 5a112b6ae54074beb4f1786ad1f67524f4be673ef319066a3a304f43eedfc274
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • 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.
  • 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://huntic.ru/uplcv?utm_term=windows+update+0x80070020 In PDF document text
    • http://tonwen.org/userfiles/file/46113386186.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/83189192670.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/raresobidasom.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/mugariga.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/zonosevifu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/51821960784.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/bipowovopedilobuvutez.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/68464537116.pdfIn PDF document text
    • https://full-e.com/app/webroot/userfiles/files/20210915_191934.pdfIn PDF document text
    • http://classtool.info/upload/files/komewovu.pdfIn PDF document text
    • https://taitaosuckhoe.com/uploads/files/38744063855.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/lupemokufosaxena.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/66142534750.pdfIn PDF document text
    • https://sujatasfoodopolis.com/ckfinder/userfiles/files/33476273087.pdfIn PDF document text
    • https://jung-yeunjang.ch/userfiles/file/diwudidavuvu.pdfIn PDF document text
    • http://irinabailey.com/upload/files/52572603581.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/35306523118.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161532e1cb8966---86810605800.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/6hn9124k46bm8u8243jqu9bvc9/17491344540.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/17236903996.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/kijujonaxipofugu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae010c8dd2---sabojawiduwokusagog.pdfIn PDF document text
    • http://space-edge.com/upload/files/zumuseforedudenoz.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/62621584905.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_off0000ae5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66D 14208 bytes
SHA-256: 46d3904f16031685c0e6027f245883a684bdde0f7c4f50a874fe938197adca04
font_02_sfnt_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 11020 bytes
SHA-256: f2608389263e8d9f1950b4ab9868f2c3bd4423679b9930a53d9310bb5f6e3b73