Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b30e910d0530c79…

MALICIOUS

PDF

72.2 KB Created: 2021-09-28 13:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb4757adff9a8c3184d261028d406b00 SHA-1: d37739d0d479d238abc0b04844a9191016314795 SHA-256: 6b30e910d0530c79a8f92c72894bf885176e1d37f7838298a56916baafc2300b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://angelofthewinds.net/ckfinder/userfiles/files/damajuzomaziwisemubu.pdf
    • http://insei.eu/userfiles/files/30372287844.pdf
    • https://online-wums.com/files/files/gizesitixivew.pdf
    • http://haohanlegend.com/Uploadfiles/files/ledojitaxiladoromejowed.pdf
    • https://gcr.goldcrownresort.com/magazine_files/files/87532424604.pdf
    • https://selispin.com/calisma2/files/uploads/67762895581.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7290550010609200276d0f093a980c00/kiligugakelixugawusa.pdf
    • http://maturitni-ples.eu/UserFiles/File/lapemuzuka.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133228ba47eb---98540689790.pdf
    • http://cheumst.com/upload/fckeditor/file/90162244931.pdf
    • https://jecoexports.com/ckfinder/userfiles/files/birunizew.pdf
    • http://eros-arena.name/eros/userfiles/file/63237776905.pdf
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/difomusizemitipulofak.pdf
    • https://jagamimpi.org/contents/files/rugeraxe.pdf
    • http://profiklub.sanswiss.cz/files/file/wetukubis.pdf
    • https://frigosztufi.ro/ckfinder/userfiles/files/guwavebu.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f35b5e0901228f0fb3f21350e100da25/kuzoxelodirori.pdf
    • http://kco.su/userfiles/file/muxozarolosimag.pdf
    • http://petraifevronii.ru/ckfinder/userfiles/files/92390149143.pdf
    • http://technoauto.jp/js/upload/files/22824141458.pdf
    • http://westernmaki.com/uploads/files/76174854940.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335fd6ec0a0---nezebufipubunujag.pdf
    • http://vandofigueiredo.com/userfiles/file///guwavaj.pdf
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/61049201063.pdf
    • http://www.parkwaytransplant.com/media_upload/upload/files/40639534398.pdf
    • https://12shio4.com/contents/files/64814424084.pdf
    • http://kantipursecurity.com/userfiles/file/vupowejafimizikivif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=poco+launcher+3.0+apk
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b83c.bin
6057e0a7e43febef6ec9e23b789191f1fe09b9721cb578c94b7b2f8cac48c2d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB83C 10664 bytes
font_01_sfnt_off0000d0a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A6 16792 bytes
font_02_sfnt_off0000e8b8.bin
0797a9ba886ebf444ed129f780cfe0446eed1287b018c2abd2cf302e995595c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 16680 bytes