Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba61c4ac75f7c400…

MALICIOUS

PDF

82.5 KB Created: 2021-03-14 13:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef83e94fa00cab6cc416b87a7e2a808a SHA-1: 8f45f9f6552df758adcd5b3ebc690139fb2478cd SHA-256: ba61c4ac75f7c4006af4dfc792ae0115f53b59ea41dfd0fab2188aa4b09e744b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a site offering an academic paper, likely a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=advanced+mathematical+methods+in+science+and+engineering+hayek+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474739/normal_60094bce7f055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496170/normal_5ff527b185d75.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/f7209e6d8dda.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/8jcGhcg/deus_ex_gog_machina_definition.pdfIn PDF document text
    • https://mitukuruzatag.weebly.com/uploads/1/3/5/3/135346955/fatek-derebofegonoba-tiluxovuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388272/normal_5ff96a7027790.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/44ijfpQ/the_blockheads_inventory_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/jcZfBgh/plants_vs_zombies_garden_warfare_ps4_store.pdfIn PDF document text
    • https://jeputuzomum.weebly.com/uploads/1/3/1/3/131398597/194492cefd9863d.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/fisosofesat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_603533ca0eaa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_60055afb56f6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_6032fc3139b24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_5fc5ea7133de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_60185c6dc4ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_604bc60b3847f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_601c750a6680b.pdfIn PDF document text
    • https://sogatawinasefe.weebly.com/uploads/1/3/4/3/134327891/1508275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_5fd64782c66e1.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/hkHigjg/rarafexenapirawemokatuwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/15987478725.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/nccn_guidelines_cervical_cancer_screening.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/gifafepebijuwud.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/wapagidurinonuxosi.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://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_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 5784 bytes
SHA-256: ccfafa133e054064f89cecd5cc52517241c71eca7ef6e602c6508b7f4080027f
font_01_sfnt_off0000ffd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD9 11836 bytes
SHA-256: 59571000782db6bdaafdbb70172eca30221c5d743658bb691ee4da5677aa50e6
font_02_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 16080 bytes
SHA-256: c3f4daf87bd991286a272c81413967efc8b45f11c319848930383fb2b5ff3459

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