Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae181677852fa20…

MALICIOUS

PDF

71.7 KB Created: 2021-10-09 11:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 06429bc819a5d43c8dc79dcca2d33dbe SHA-1: a4ff96feb65b848959c32a7448fd6390fc8c4a58 SHA-256: bae181677852fa20f5795313fae012a86bf7ffa5858ebb5a488e66965628e669
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to be junk data, but the presence of JavaScript and the link farm heuristic suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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 https://archism.ru/uplcv?utm_term=nayfeh+electricity+and+magnetism+pdf PDF link annotation
    • http://geometrarontani.it/userfiles/files/bonukitek.pdfIn PDF document text
    • https://flyags.com/editorResources/file///16541531878.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/kemupagipovasewem.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/kiluxi.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/19891575946.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/90633433490.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/79741540507.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/gazevajiruxunog.pdfIn PDF document text
    • http://iscelenie.info/files/file/23908463207.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/37331773405.pdfIn PDF document text
    • http://fittbikese.hu/files/file/8278366397.pdfIn PDF document text
    • https://pecsikult.hu/files/file/rudekakidelapiji.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/moxunalelarekifomeg.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/52346239330.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc5f938edc---91391517595.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1890976401.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/limigenufuta.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afef1e88b5---29968994597.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/54084702676.pdfIn PDF document text
    • http://hairfibers24.com/upload/file/35621575463.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/24482604499.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/12457797271.pdfIn PDF document text
    • https://kopari.hu/files/file/kuxewanoganidef.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/72285737021.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/fisuwogok.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_off0000b7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC9 11036 bytes
SHA-256: 31b3b0acf9b07f62bf8779545370169677590b911ef10fbecd09edab822801c4
font_02_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 15768 bytes
SHA-256: 2e6a7f6113ffc62453ba8d5d7fdd7e36f7990e90749ffe0403b4ca88bd3b8ec3