Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa87772b16ce1d4b…

MALICIOUS

PDF

91.3 KB Created: 2021-10-04 15:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 9f878de9029e39b2bf8b6203f1daeb44 SHA-1: acccd32d7455bea95da390d65fc57c85e4bd6742 SHA-256: aa87772b16ce1d4bc718911851d9944764d83400d0d634db29f17946f29c5451
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b84df070ed---gameximorufululofo.pdf In PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210925_100305.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/xilokatevojaxeva.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/44953937786.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/tixanigonawod.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/87841681446.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-10/20210910040447945086.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/dapudikuz.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/93412684842.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/tabaxasefajuseje.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/sajez.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/sekufevajoxepuwaxop.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/lekofezavavubukamur.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/56822394958.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/30519753471.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/65212806313.pdfIn PDF document text
    • https://eternalbliss.net/file/torexadudujerederoxadis.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210924105812.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/gitexeneraselagijuruwo.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/1289814853.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16152e18772391---10050663779.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/tivowonaros.pdfIn PDF document text
    • http://ping-property.com/user_img/files/gebijaje.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/fujajuboxazixafo.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/kafobipogibugovarajel.pdfIn PDF document text
    • https://foodbiz.bdata.link/upload/files/71083831340.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/84433189384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=wolf+hall+tv+showPDF 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 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_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 10028 bytes
SHA-256: 44a65d104252c2a963a834b84458935eab341e8effc7ebb30ab268cf957885f7
font_01_sfnt_off000112ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B01 20152 bytes
SHA-256: c771e01be00d7a3a863f2e084c1852d6c69947d31aeb9fa7d57b3739a6f9d282

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