Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99fdde2816eedfe…

MALICIOUS

PDF

76.3 KB Created: 2021-09-10 10:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 8afbe3c15108c978b2b82ef44ae19eee SHA-1: 2c86f768e809365566520eaa7056cbcad9495296 SHA-256: f99fdde2816eedfe1592800bdc145cce3ccd5a1eff9f1c76e9847c820f2c0a47
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • 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://nomylo.ru/uplcv?utm_term=gangster+mod+apk+download PDF link annotation
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/43870912836.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/73652701367.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/xisusifuzufup.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/rovubigekemipodesosifefip.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/89107503956.pdfIn PDF document text
    • https://12shio2.com/contents/files/lifafedijo.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/88192057d647204d66ce0d9b4fd13bda/gorirur.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/3630728748.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/85441758613.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/noloredudotap.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/5930079590.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109090655062931.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/cp9a4t6f2b8es2bg56n1k8t3m5/6087798633.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/kopekopi.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/3491701905.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/26686703093.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/36684887691.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16137c70b3a9e7---9384051963.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210908_D3E8A6CBC310E218.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/33386961071.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/28634871711.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/lejitun.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/gepufubewidam.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109040759231835.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_off0000c306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC306 18412 bytes
SHA-256: eef240aa47261b087a192243e00fc45525b4ef537e1cfb42ec43eb12e894db42
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 10860 bytes
SHA-256: 8fce15b55c8ea428e212b92232e82c25ffe3987c7de8b2c007d4d0277fbd50b9