Malicious PDF — malware analysis report

Static analysis result for SHA-256 e982196f557aab44…

MALICIOUS

PDF

76.2 KB Created: 2021-09-24 18:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f0d0446e346e85c26a19f652cabe086a SHA-1: 66f888b433fa3c72b7c3cbf03e67039865bddea1 SHA-256: e982196f557aab44378fa19761c16529fd68ff0d23eb5d278b5b2e21de937aab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of link farms hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=watch+live+boxing+tonight PDF link annotation
    • http://npk-bypassdrr2.com/file_media/file_image/file/48632795203.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/rifosivuxajorinefurinefo.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/lodamumimabewobalololu.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/90140251232.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/dedawiwanunefiretopenon.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/mufuxuxaxalolibevir.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/88542178713.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/puxunesujivifarewikis.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/nokadabutojujudikusibega.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d47509c170---40651913911.pdfIn PDF document text
    • https://www.miotsukushi.or.jp/system/ckfinder/userfiles/files/womagi.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/sanijutosomofelabom.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614397594ceb9---zusevixipogupur.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/gewunesefovafuxokafugenax.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/gidivipe.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/89373952152.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7041a2b47---87816999736.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/46616056522.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161476d3708432---podirotajuvixopifik.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/35804575799.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16146dfe0e93e9---roguboligafuberibolor.pdfIn PDF document text
    • http://pasted-radio.de/web/files/58621422616.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130405ff0ba7---sofiwomi.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143691796890---57959278636.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ff4a3034d3c38e3cf5728c187839e472/kalopinu.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_off0000bfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCD 19296 bytes
SHA-256: 579aa041857d324884ed0850c1d88758f2b534b9b6c46ee2e187e0077f20584e
font_01_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 10544 bytes
SHA-256: 882d939de0069df0273b32d7d0f81af94c1f6af0300ab62a918e1516fec3a652