Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fe25d91e8c6675…

MALICIOUS

PDF

72.6 KB Created: 2021-09-17 08:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 48a8891560f236508f9282efcefbe5b6 SHA-1: 13cdd5cb3944b71e4fc3fa7961529d68682d6c78 SHA-256: 86fe25d91e8c6675b1482cb686aee997df37cbe7418984f42aab5c3038d86541
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 hosting and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://nomylo.ru/uplcv?utm_term=best+pro+vpn+for+android PDF link annotation
    • https://alemarferries.alemarsnp.gr/ckfinder/userfiles/files/45223908544.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161403900be6b2---14073864087.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/23565881233.pdfIn PDF document text
    • http://woykoff.hu/upload/file/26811853080.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/jusoris.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/50104816531.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/ade0e4a05f8a1a3a353746b3062b7728/vofeni.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/57698782221.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/77825016591.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/mugupibawalefelutawolozuz.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/82799357514.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/44543089758.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0906/48e8d023c2417353b81ab14dd9280965.pdfIn PDF document text
    • http://anpo.vn/upload/files/58137773889.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/betan.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/xisus.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/fezifudi.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/80323811445.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/wuwufuguvugin.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/vadijugegawikixupozepo.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/kodisamutawevafupek.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/besojedibatubox.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/18705970072.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/6356440330.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_off0000bcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFA 15452 bytes
SHA-256: 3e2a7ccb2b16d35841e0577a55194015741f9ddda0ee8c9c3b4e5df2932995db
font_01_sfnt_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 10564 bytes
SHA-256: f3e66fdb08bd368c91345b5b27474204725f9f1ae3f67e70771ea37c321370d2
font_02_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.