Malicious PDF — malware analysis report

Static analysis result for SHA-256 f201e906abf40e72…

MALICIOUS

PDF

76.8 KB Created: 2021-09-01 04:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1670c3700491da9b2d985c2787043e66 SHA-1: 2ad3437ee4164b1317da1a214a190575a085e806 SHA-256: f201e906abf40e72ad70f4ecab2f3a1112d8dfb34a7cb7f6532e39c95b0cb587
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the structure and URL patterns suggest the document is designed to redirect users to potentially malicious sites, likely as part of a phishing or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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 http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/bunejewelelivajoforuja.pdf In PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/gosogifuniduwi.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/8208833698.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/zojokeguwiwozevepawob.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/79359850583.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078e73227676---livipuro.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/katobobuxuluve.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/sogoremofavazeto.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/24208764972.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/dofelu.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c936afc5686---79877884978.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/saninizod.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/zipefarofuxolavezew.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3f1342e5dd---31047959359.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/9f82c03cd31eec84563874c313e058c2/49409397089.pdfIn PDF document text
    • http://pasted-radio.de/web/files/xuzovuduxixoz.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/e35ed1714756656f3a466c4e1d1ed828/mifukewabasivos.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ol3m9ieukffvsa35nfif0g0c1r/luwobufiliputisiru.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/lovc3st0l6cpi5p4cfgan9it8p/15568051684.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/nujexuto.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/sakoxadinebuwaraw.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/7e3d66a788bc873ea2c1622b7b11cb22/24282491073.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8ed6c36b6c71873a69b5968ee29a7191/83542880319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=san+diego+cityxguidePDF link annotation
    • 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_off0000c849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC849 10620 bytes
SHA-256: 20c0d66c7d3df89491fdf97777f91868fad3c5a1f533ad1e5e3f00893711affc
font_01_sfnt_off0000e093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A5 17500 bytes
SHA-256: 7adc356d1a01f10b9ab052ae154507f249e6e310c2051d84352390481e54a987