Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa81d31ce856c312…

MALICIOUS

PDF

337.8 KB Created: 2022-02-04 07:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 48943b92f2b2b72f47bdf221bdce24b4 SHA-1: 0f481c8779238b85d0bef9e6327965853ca7c697 SHA-256: aa81d31ce856c312a712494beccea537904c8623b002eef98e584b3d9e7d8ec8
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6817

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://cafij.co.za/XSRYdR1H?utm_term=whistleblowing+policy+procedure+template PDF link annotation
    • http://psychologadamczak.pl/userfiles/file/95406605798.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/31043587451.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/40oi0rmdg5cp84nltn4mi5p04q/mivokojinusatiwupofo.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20211013120122.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/kuxujemeja.pdfIn PDF document text
    • http://captainkillmite.com/uploads//files/202108110404294106.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/4732918360.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/tekosufixobawewozekifo.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/9187495370.pdfIn PDF document text
    • http://www.clinicainthera.com.br/kcfinder/upload/files/19130986439.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/57474326121.pdfIn PDF document text
    • https://bandloc.sbchecks.com/FCKeditor/file/80051496655.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/58781203822.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/pawezogusu.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/23582050060.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/sixokojikarikoxowikezi.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f719485dcd0---57703580044.pdfIn PDF document text
    • http://surtek.biz/image/files/20150728_042015.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/defaleboforejujewe.pdfIn PDF document text
    • https://questymeca.questyme.com/userfiles/file/53894528382.pdfIn PDF document text
    • https://produse-zilan.ro/files/kimegikopek.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/66697377427.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/wivixenizuro.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/zapenosutute.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4805cc55dff93d1a416c1093672677eb/94343477601.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/40496821397.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/muwunutobifa.pdfIn PDF document text
    • http://mayjack.com/upload/files/44632863275.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/raragapekagadosi.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/rizidifaziwafuri.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/kizafod.pdfIn PDF document text
    • http://simonova-zahrada.cz/ckeditor/kcfinder/upload/files/vujusujatomizonobuw.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/87211995175.pdfIn PDF document text
    • http://ssmsuits.com/kcfinder/upload/files/69062895541.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/bozapulodapirapuwup.pdfIn PDF document text
    • http://jonellchem.com/upload/files/waponusajimatuladigu.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/25259980188.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/20312132695.pdfIn PDF document text
    • https://www.voyagegroupepascher.fr/public/kcfinder/upload/files/dulunenameraderebe.pdfIn PDF document text
    • http://sankoux.jactokai.net/kcfinder/upload/files/tinude.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/dgjn7k41g91dk9do6mrefpbl3k/sokipovanaxa.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_off0004d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9A7 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0004f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0C7 11396 bytes
SHA-256: 6084df8635b8d2526c07af6ca9c7bbd7b35527896c933429e861e44c9a985502
font_02_sfnt_off00050b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B16 17448 bytes
SHA-256: 62879a63dd7a2785a8e2505bd0569ba81ee85d8540b0abe343238bb2d170de81