Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e34927987e8bdb8…

MALICIOUS

PDF

75.6 KB Created: 2021-09-15 13:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 29c1241f479652866c3f7fb3e269c0ad SHA-1: 804f4d312137f5e685cd18f00afb996e7a79d348 SHA-256: 6e34927987e8bdb8cbedbe4db373a347ecf842bee277430fc2e7ba3a8fdf9f49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the PDF structure and URL patterns suggest an attempt to trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=gta+apk+data+download PDF link annotation
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • http://0-50.ru/userfiles/file/2779747312.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/tufitojavimexurejile.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/fekavosuramawozo.pdfIn PDF document text
    • https://hiroyoung.com/data/files/38440262039.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/52959598020.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/44134042841.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/33051607526.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/danamadafowotatu.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/dixarifabigudi.pdfIn PDF document text
    • http://terminsk.by/pics/files/fegeximepapegefuxadarubux.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/lises.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/46715318735.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/voviwikogava.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/jimegazukosej.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/sanedubilegope.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/xekasepepevuziwixa.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/68423346182.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403f480ca58---90652903560.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/telamarakonu.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/52151540433.pdfIn PDF document text
    • http://gtshotel.it/images/file/78160096296.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/surudubuvebe.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210914095342.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/xijibogo.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/jifudaburazegisolatumuded.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_off0000c35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35E 17948 bytes
SHA-256: 5f4c2731f4e32e74806b4778411dad72d57b31ed5a8c392aab04d9c9e3ccf030
font_01_sfnt_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4D 10112 bytes
SHA-256: 4a82f9ffeaabbd62731ded913f975ef1e4f650363a573470fda203c909c57fe0

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