Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251f673e5e95a8d…

MALICIOUS

PDF

434.4 KB Created: 2022-02-07 11:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 8131ad74ae19f10966091ca20691772d SHA-1: 75ed1d1683b539da9b3bacb21f427269a12e09d8 SHA-256: 4251f673e5e95a8da18d7a4bf29ec76dcbc7d9919a24d93d06fdc7c7d4991952
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5007

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
  • 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.
  • 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://colod.co.za/XSRYdR1H?utm_term=chaukaghat+iti+form PDF link annotation
    • http://yuc-fac.com/uploadfiles/20211022151145.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/25663117828.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/lujukamenoni.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161a21ac64df19---dilisuxudu.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/mijokotogikup.pdfIn PDF document text
    • http://mopron.ru/upload/files/dekuxujobokepuduxipilanu.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/zubobuxibisosefe.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/mutubigitubeloga.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/95737100959.pdfIn PDF document text
    • https://nesbedcollege.com/singhania/downloads/file/91682110016.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/94242914124.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/32066699553.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/10916755158.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/sisomijapudipeno.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/sawizoz.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/7b655e8dcbb5eb253a0b79265f739305/1681621289.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/vivizumo.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/88675230581.pdfIn PDF document text
    • http://webbuilders.com/files/file/20345313389.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/45174612166.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/xemiko.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/89845803537.pdfIn PDF document text
    • http://cascad-trans.ru/files/luvevujejux.pdfIn PDF document text
    • http://dslr-camera-on-rent.com/kcfinder/upload/files/zorijomovulofufog.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161d263e987db8---55512042407.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/45765730360.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/31631863309.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/c5d9310b75a2cb002b49baa083729797/5324741838.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/27776180030.pdfIn PDF document text
    • http://dichvuketoansg.com/luutru/files/94185120517.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/pulapiziwuwunalepufuraxa.pdfIn PDF document text
    • http://biomehl.com/images/content/files/wiwosikofunubosela.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/83207599096.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/633993920.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/rewigilububupokixote.pdfIn PDF document text
    • https://nexusmediation.nl/files/kuxusime.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/69838516048.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/82692382625.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/wixewez.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_off000660b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660B4 10436 bytes
SHA-256: a7c3b2038eba504198e890b1c071973ee6335a944a35304c1ea3c0cae197e3d3
font_01_sfnt_off0006786b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6786B 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00068f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F86 16436 bytes
SHA-256: b9c88fdab6784ac34175bf81ec44cb918427d60d4329fafc58505878fb15ed29

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