Malicious PDF — malware analysis report

Static analysis result for SHA-256 485295ffc9e7a98b…

MALICIOUS

PDF

79.4 KB Created: 2021-09-11 19:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e4d25f5b8686f57afde5aee2b713c175 SHA-1: af9e667e2423bfcbe2e1fd94d3ca4c1a644a140e SHA-256: 485295ffc9e7a98be39e17c8f79ef6c1250eab5a1a1f3d18be1044ba4174d405
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://coretry.ru/uplcv?utm_term=how+to+recover+deleted+messages+on+note+9+without+computer PDF link annotation
    • http://rspon.pl/images/wyswig_images/file/15436139594.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/45513157395.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/tosazajuziveluweso.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/97337263527.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/35781870263.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161368c305af6f---9568782923.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/koberugukali.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/55725007937.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109012123072647.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/77913300854.pdfIn PDF document text
    • https://parc-hotel.info/file/bejodoganusozawew.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/36561817677.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/vawew.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/43779a7e29d8f15b7bb60cc644812f73/ginije.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/36702037681.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/baparuxopajepogemakokuveg.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/sowozojoma.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/kosorofusakumirozasid.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/14636517450.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-5/20210905093104444730.pdfIn PDF document text
    • http://le383.com/uploads/files/vigagegaxenemosesu.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/79712899688.pdfIn PDF document text
    • http://sbkf.org/files/files/44519704383.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/bajegafarodali.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/gudotomiratipug.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_off0000cf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0C 11372 bytes
SHA-256: 58c3f4c83fc39791ea4d40294def24110cc5a1c2404a085095298e492aaf171a
font_01_sfnt_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 17800 bytes
SHA-256: 5455c263b0c7e1ea1f571b6fa7b9a8ddfae25196a0fa721cacbb2b3e669d47e5

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