Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8fc8b6d04299a5…

MALICIOUS

PDF

277.6 KB Created: 2022-02-27 00:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: a409f2de824ae7a85cc8d5c9f6b53e25 SHA-1: f1206c36ab8f3783fb25e2bf1f29942c0ebdc250 SHA-256: aa8fc8b6d04299a55eb333d18d07b16b2fabd819c4d4018a0513b396ce8240bf
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7038

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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=socratic+seminar+preparation+sheet+pdf PDF link annotation
    • http://grabnerestriche.at/xoxadasibopufajox.pdfIn PDF document text
    • http://telecycling.org/files/file/56797050432.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/97643931832.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/mujubibufaxojalokabu.pdfIn PDF document text
    • http://ipceurope.be/assets/file/8287794839.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210919_5080DBA1C1FF38E5.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/biror.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/76553808854.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/76833981760.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/xerusedawoto.pdfIn PDF document text
    • http://samtle.net/ckupload/files/deluxagugivufejumivakopol.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/19796215004.pdfIn PDF document text
    • http://zhuxintrading.com/uploads/ckfinder/files/20220102/16410775109269.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/24817447406.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/zubemalogoxapizuwopo.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/lugarezifo.pdfIn PDF document text
    • http://cobweb.janci.net/upload/files/80062986795.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/kaboxo.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/45392483213.pdfIn PDF document text
    • https://groovinman.com/CWSAP/sites/default/images/file/lisibot.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/r1md6d2die43h4im7qfq6llum3/53744250095.pdfIn PDF document text
    • https://domainedulacstellan.com/admin/kcfinder/upload/files/9960707742.pdfIn PDF document text
    • http://jadeite.ru/images/file/39599708560.pdfIn PDF document text
    • https://www.sinditamaraty.org.br/site/public/ckeditor/kcfinder/upload/files/dujanetulijul.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/26264715668.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/8795562764.pdfIn PDF document text
    • https://elemonbg.com/Files/File/7557364536.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/jojiz.pdfIn PDF document text
    • https://swiz.eu/files/editor/dewabuxosiwamuk.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1181422551615fdd4a445e2.pdfIn PDF document text
    • http://abpaluso.com/upload/file/76788252671.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/43908293637.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161197d0ee11f5---dugibijakunaxepel.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_off0003e452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E452 19080 bytes
SHA-256: bd97064ea870a868ac937a8f77910f9d5b305c5f40321d9b73ae62fb89bb5d3a
font_01_sfnt_off00041672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41672 10912 bytes
SHA-256: a323c83982dfad51b5964d6578738b5f11c48ba3520c1b47049e5805e7841b22
font_02_sfnt_off00042f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42F77 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9