Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7e0f3c3d6400cb…

MALICIOUS

PDF

80.1 KB Created: 2021-09-10 19:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c395df629d8484754519337356214e54 SHA-1: a22bd6bea8a7256a1c025cf9e7347e6f36d07310 SHA-256: dd7e0f3c3d6400cb01ed82036c55f9895df61b7d8011a7084d2ec085ffdb17b2
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=fast+and+furious+5+full+movie+in+tamil+hd+1080p+download PDF link annotation
    • http://rowadhr.com/app/webroot/upload/files/xumefazaviponit.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/60637074302.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/xulowipejutezopakowafosal.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/97500171333.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/46815732612.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/93546781251.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/nuwaber.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/94037324916.pdfIn PDF document text
    • http://surausa.com/uploads/files/sinitabapedobu.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/35838283108.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210902_151425.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/69554467069.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/kanomekojujeselu.pdfIn PDF document text
    • http://rotang.net/userfiles/file/25647029495.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1a0b61d09---87521771411.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/60358823723.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/10757358468.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/66945369014.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/41482998629.pdfIn PDF document text
    • http://metallpress.info/files/dagojolub.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/lugokezudiburip.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/figilemevubolavababi.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/laresawexitilonedutot.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/28988314006.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49261698134.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_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 11508 bytes
SHA-256: 74109b2359bb2d154d1bc4971cc9e7cb548eb28e8b9cb2e8fd9263c37a346ff0
font_01_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 17492 bytes
SHA-256: b4a1bc0a172b5fcb9054dc1008dda6eba08f131226eb415d50b7947903bf25f3

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