Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b5739dc21d45c1…

MALICIOUS

PDF

228.3 KB Created: 2022-03-24 00:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: e9a40cf912c1e9564e737bc965f0bcd0 SHA-1: 740771123dc3813b231d167ca8987aae93ab51a6 SHA-256: 88b5739dc21d45c103c61d26079a63692e108b8e2bd8466ba39f92824fd3cf17
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5785

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mail.insetclean.com.br/kcfinder/upload/files/jinuguwozezexurilow.pdf In PDF document text
    • http://www.donkersmontage.nl/kcfinder/upload/files/63208862678.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/79495588296.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/54257524386.pdfIn PDF document text
    • http://www.albertoabajolimousin.com/abm/Bibliotecas/kcfinder/upload/files/97995581886.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2022/02/16/24709782887.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/21152919119.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/38925523203.pdfIn PDF document text
    • http://nahar-bd.com/assets/ckeditor/kcfinder/upload/files/82562585556.pdfIn PDF document text
    • http://anpo.vn/upload/files/bomekegewokukoxolube.pdfIn PDF document text
    • https://club100juta.com/assets/kcfinder/upload/files/filarugavudux.pdfIn PDF document text
    • http://vandofigueiredo.com/userfiles/file///20585455704.pdfIn PDF document text
    • https://kingsnews.org/app/webroot/js/image/files/68992589850.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/lowejonesigafixokusowiran.pdfIn PDF document text
    • http://djpress.pl/Image/files/pamumatazefijak.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16236953609e6f---fanimimesovinanusunetenag.pdfIn PDF document text
    • https://scorestop.com/uploads/files/zekodelikox.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2b9bdbffe28ba3b1b9f310788680a5d8/18895719228.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/ravurawevudivoju.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/zavebotutedupenatu.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1622e967a86c98---fobikewemikelume.pdfIn PDF document text
    • http://isped.net/kcfinder/upload/files/6096015558.pdfIn PDF document text
    • https://slavyansk.biz/userfiles/file/vufubofejik.pdfIn PDF document text
    • https://motelandratecuci.ballroom-andra.ro/userfiles/file/71341803076.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/moguxizoro.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/nowudezinixoromo.pdfIn PDF document text
    • http://shuswapfireandsafety.com/userfiles/file/69117704130.pdfIn PDF document text
    • http://xn--80aer5aza.xn--80aai5amepo3c7b7a.xn--p1ai/ckfinder/userfiles/files/4911974929.pdfIn PDF document text
    • https://bloc-immo.com/images/60456835342.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/11830873506.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/mitukegamixonetavolixeda.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/61905866249.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/xofikixavunuganoj.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/073dd0bfedb877270efc6aaa61d31e96/fovadupojope.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/15196507296.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/lezezu.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/96667565231.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/pakis.pdfIn PDF document text
    • http://doicoffee.co.jp/js/kcfinder/upload/files/84033951527.pdfIn PDF document text
    • http://thedreams.cz/files/xexakokepone.pdfIn PDF document text
    • https://sunuf.co.za/XSRYdR1H?utm_term=toshiba+regza+55PDF link annotation
    • https://xn--90ah6akb9e.xn--p1ai/f/file/83017123323.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 extracted file (font_00_sfnt_off00030c3a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00030c3a.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C3A 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00032355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32355 18168 bytes
SHA-256: ba05c8bb22842f5d4462a71609a6d3033698dd55dc83d872b3c66921293a5967
font_02_sfnt_off000352e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x352E4 16336 bytes
SHA-256: adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa
font_03_sfnt_off000368e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x368E9 10436 bytes
SHA-256: a7143d61ec19754148add653821db7264809d8a2ad3529e0ff79e025568f8d5d