Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cb549fa8d0c259…

MALICIOUS

PDF

72.1 KB Created: 2021-07-01 09:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2560c406403818b524a9af861f299924 SHA-1: d476fbe6f670bb5f1d5009424ebd7da7a7a6277f SHA-256: 25cb549fa8d0c2595e8d1303025a25559ffb0fffbe20413c282dbb62156901d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various domains, many of which appear to be hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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
  • 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
  • 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://drafthe.ru/uplcv?utm_term=d%26d+challenge+rating+to+level PDF link annotation
    • https://biothiennam.com/media/ftp/file/wonatosew.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/funigunerafuxisovawa.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/1412d137ad95e3f35f20adbc3dc6bd00/bupowis.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/63206317074.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8456108667---39161680702.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/66d8be63ebd85805e72fe81ee543c630/63299962247.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/fawofumodididesujo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795ce909236---ravenuvibimaj.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d97a188cf7---83547763052.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/gigetixiwivopev.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb516249b---tejefulejisaxi.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/mubanurewuvaxelu.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/9556583145.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897ebea6661---dejudasoku.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/tovenetotolova.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/67601466124.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856538a1875---18669825829.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895caccbece---poxowokofudenupe.pdfIn PDF document text
    • http://jarosi.hu/files/file/felizolomevufoneteka.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/51498939264.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/pizebujebegatoruro.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/rinarufevewev.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/ribawavusimarag.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8b881b79e---58480141580.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608724032e903---pobegimoxalujamogax.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F6 18384 bytes
SHA-256: df76e1b8d162f547480b4213de468bfcb19578e16b22be79e4b1b1ec18ee4945
font_01_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 9752 bytes
SHA-256: a7bb361bb0e39e6dd626d0f68aeab88f084deda480e0a5cc09c882b3d13a40b0