Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeb3b48ec37f043…

MALICIOUS

PDF

76.0 KB Created: 2021-09-03 20:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b16fe2829d5a198198b6c6d3dd307bb0 SHA-1: 2393f244e9379ea8b824f2227fee2162498d50ab SHA-256: 2eeb3b48ec37f043a7c371010f2c67c910700dc19ab8b3966bbde07b3502bd2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://dakotaterritorydevelopment.com/ckfinder/userfiles/files/movipegilurin.pdf In PDF document text
    • http://runwellconsulting.com/file/file/99667488439.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/57001845023.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/da9540d8f72a1d652da7f2628be19b7c/32000591385.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/8104395405.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1068d9534---lemiredolidukufekufapo.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/wuxuwabuwumedog.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/vazurovatikikipanera.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/sirasenibelatob.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609447d7eadc8---gerizusutisusoguwutaton.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/44861650214.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9dcf061d4---lexoxumumere.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/34666551599.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/bj26u2g5imh1hh0f3hrcu8k2rh/75386527710.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/85551797696.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/59651494621.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16118429ae898d---kuzoninixazalelalomir.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/84811280806.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969a15493d7---59472447027.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/sixedowisutijazifuti.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/k2v0ep0rf77obhvv80q1r5m7nk/tovabukuboxixagavazolop.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/jepijadawubupugef.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/91934115486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=adobe+pdf+rotatePDF 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_off0000c81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81D 10204 bytes
SHA-256: a1338e7b1dccb9132344b302b4f7d397fad6041f5272a87efa0cd5b3bd87d321
font_01_sfnt_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 17164 bytes
SHA-256: b9c21fa5840dfd8ded5d0492f14f55af530f12b6a1763cd0dea501b9d9226d56
font_02_sfnt_off00010a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1