Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95d3e25428f515a…

MALICIOUS

PDF

71.6 KB Created: 2021-09-20 07:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1364bb055b979d46de55bc2db5aa07f7 SHA-1: fa7c0f0b29aee2a760363ff9f27f5861929c9c09 SHA-256: a95d3e25428f515adc59e0ced956ce350b9341c7ff89a74c343267b1eb814907
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=fifty+shades+freed+putlocker PDF link annotation
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/zebanumewotimuvilolob.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210917_2462E7BDE9B57446.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4tgfitemto8haodiumj13gdvp5/muzukamuwemojimarinizezim.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/dezotaf.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/winegijarijize.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/24029923991.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a2a8d3612---44295574752.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/sakuwabipewilosojemas.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/85080577596.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/56973488173.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/64890141627.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/vijutuja.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/40037556840.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/sojenunipez.pdfIn PDF document text
    • http://snsi.jp/image/news_file/60082888324.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/vawinalakivofokifusejirug.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/lizab.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/8965318478.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/rusapo.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/weloxutawixazovukuxaleli.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/67148337823.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/96861480615.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/92104541141.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_off0000b679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB679 15972 bytes
SHA-256: 222588e4f38dbe17504d424794cd86a7636d76112b2d6dbb60a9689408970d59
font_01_sfnt_off0000df9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 10896 bytes
SHA-256: 4b5b9606beabbd5941814c83c88316d19df2feb39b871ce517b2e0cf80d59705

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