Malicious PDF — malware analysis report

Static analysis result for SHA-256 6961b978a3b32054…

MALICIOUS

PDF

80.7 KB Created: 2021-04-04 23:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b7a0ddd96cbe860e576de79c27ff06c3 SHA-1: 22753094e64b53883ff3d824276ac4d44b42cf84 SHA-256: 6961b978a3b3205427d04f2c8cde1e86194e03e4f008f10a879add3f9b1acf11
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains external URIs and is part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to downloading stories, which is likely a pretext to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=panchatantra+short+stories+in+hindi+with+moral+download PDF link annotation
    • http://bogplaktnc.fun/kuwowodanuvogomexezuxubtuucn.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/soranunuj.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/american_english_file_book_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_604d0b4280ebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443341/normal_5fed3b5e11cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_6044d1d89f756.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/43333612418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_600c73814afa0.pdfIn PDF document text
    • http://bamupiwabibajew.mywebcommunity.org/jagon.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/87107259685.pdfIn PDF document text
    • http://tameenegypt.com/fixakamemixijerbkne.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/givugotesadadoj.pdfIn PDF document text
    • http://shopmzm.site/808279670827gyxk.pdfIn PDF document text
    • http://werojati.getenjoyment.net/top_down_approach_in_reading.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_6ea2dfaed31d4d6e8c09808f71aff2c5.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_4ffd38061fd242a9bcaea7ccccc5fabb.pdf?index=trueIn PDF document text
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_c7735da97ffc4a81bd58b2fa58e37e43.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_6dff9c877619492095a4e77e68da29df.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_a7b7e16c15934962bcef937e46c9cc17.pdf?index=trueIn PDF document text
    • http://doriponesarom.myartsonline.com/hawk_roll_tackling_drills.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_a35f10bed6834f709d67ee865e5392c2.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 5272 bytes
SHA-256: c27b560a4f757a8a2a7d098bc38c88c8fa99429e302962968334785e25156b5c
font_01_sfnt_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 11036 bytes
SHA-256: 4a001ebb40aa60d59be71cd41fedd488a6336fa107f13b4d1175e0b6742a0a4f
font_02_sfnt_off00011fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC9 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1