Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bd734d0a78dc71…

MALICIOUS

PDF

266.2 KB Created: 2022-03-10 15:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: db83bf521ef90e57a80d950b6bdacf99 SHA-1: 7a859a461759317478d83d416ed3567cd18b05aa SHA-256: 88bd734d0a78dc715dbbe54451f681cbca5d4af5eacae71087e26171ec2f7ee6
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7783

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://sartor.ru/upload/files/lubulu.pdf In PDF document text
    • http://tnet.site/kcfinder/upload/files/wegewezupivefarux.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/051b677244a770a3ae9b06350a488436/paloserazi.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/74413353389.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/riwixulujikuvasuti.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/212b46bac7f8c22b8b9cbdde6b918248/kunebarenixuwerifox.pdfIn PDF document text
    • https://festacontinua.it/public/file/94062828901.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/lekago.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16221d5829f50e---96038474942.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/pimifetodegepa.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/49247435635.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16224d8a5967ba---fokepogedanarofesekus.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/80555535617.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/sutivumaxe.pdfIn PDF document text
    • https://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/23915640571.pdfIn PDF document text
    • http://6461737.ru/upload/files/7958393342_1645054642.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/nusel.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/xifagulajudebu.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621d183b28318---bijudite.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/wojig.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/vurinosugeviruxazamazoko.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/60d88e14cf740a7147433b9b170f973a/ladesolalupiletunodir.pdfIn PDF document text
    • https://amc-lda.com/assets/kcfinder/upload/files/2367393747.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/juparosakisotodala.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/74905477096.pdfIn PDF document text
    • http://goplayer.net/fil/ckFiles/files/37404832555.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1621b9cd342a69---16020650524.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/59447532226.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/kozexenugovafazovo.pdfIn PDF document text
    • https://sd.martabemitrasosial.com/editor/files/vegorula.pdfIn PDF document text
    • https://km2804.com/ckupload/files/vizonamipagiwo.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/27255452869.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/72761383935.pdfIn PDF document text
    • https://fitxpower.fr/lib/ckeditor/kcfinder/upload/files/wutilobekolekurobe.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20220216222721.pdfIn PDF document text
    • https://ragaz.co.za/XSRYdR1H?utm_term=market+research+ppt+template+freePDF 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 extracted file (font_00_sfnt_off0003bcc7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003bcc7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003bcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BCC7 10512 bytes
SHA-256: 2d29230e7b5a3da2d5f3572343a55dbffdf4ab9eb0dec6d46040fd476385a9a3
font_01_sfnt_off0003d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D4C1 17608 bytes
SHA-256: 18e3f03ce0562dc9e51fc86779d28fac743bc32a73178d1ce86c16592a174b3a
font_02_sfnt_off000401fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x401FC 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9