Malicious PDF — malware analysis report

Static analysis result for SHA-256 a380d959f4608136…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 02:00:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85fafac7f01d45b3e0d8c5cd4d9b480a SHA-1: e0b4bcdf1eb6b1226a39f4f7dd3ace9b29ee3901 SHA-256: a380d959f4608136f491bc931762d6a27755166ea5fc652f81c4e57526606d55
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading a document related to 'air pollution'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/award?keyword=air+pollution+and+control+notes+pdf+download
    • https://cdn.sqhk.co/gulaxemetila/jhjfUha/69063290984.pdf
    • https://cdn.sqhk.co/zetanitanedo/itjbCgc/xebasazasokixal.pdf
    • https://cdn.sqhk.co/nilesatu/aRhjsns/ge_13867_bluetooth_plug-_in_smart_switch.pdf
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fd0dc8537043.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_6011351d8b75c.pdf
    • http://nitapida.mywebcommunity.org/how_to_set_tension_on_scroll_saw_blade.pdf
    • http://50offstore.pro/influencers_church_gwinnettap8lb.pdf
    • http://chtotakoebezuz.biz/573526437545cw3v.pdf
    • https://cdn.sqhk.co/nojedajoze/aCnhgKk/74404280158.pdf
    • http://lamakexo.scienceontheweb.net/xozapusajiditiligi.pdf
    • http://ig-copyrightnoticehelp.com/how_to_do_basic_calculusg5zw8.pdf
    • http://mumolazesinidix.getenjoyment.net/red_pyramid_graphic_novel_read_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zudupaxub.myartsonline.com/89289982331.pdf
    • http://tumajazumi.rf.gd/greenland_ice_sheet_growing_2017.pdf
    • https://s3.amazonaws.com/rakabexozu/25000282044.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/factorization_worksheets.pdf
    • http://ledegov.epizy.com/add_text_field_to_acrobat_pro_dc.pdf
    • https://s3.amazonaws.com/taguxif/olympus_vn_7200_digital_voice_recorder.pdf
    • http://sujawokasafu.onlinewebshop.net/fewokisewoz.pdf
    • http://walazej.rf.gd/algorithms_4th_edition_4th_edition_by_robert_sedgewick.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59f.bin
27a202fc4663912dd84eefe881e62565415a594c8d932cc435d506b128e55a96
pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 5228 bytes
font_01_sfnt_off0001078c.bin
2dc856262ff3fa8a6765b240de64a72070c7144659f69e161ec9a2270f0b00c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078C 10472 bytes