Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68f4066904c730d…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 00:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0308c2f298ab55e621be178285f48b3f SHA-1: d199873fcac44d710bddbc0b666b13df964cbc32 SHA-256: d68f4066904c730de85ce5576d34f3d91ba57d55c0645a9980e3ba92fee9f540
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are part of a link farm strategy on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://sungsam.net/userData/board/file/37651884435.pdf In PDF document text
    • http://radis-rrl.ru/userfiles/image/67855468635.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/wiwopanagoledinupesa.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/27568487859.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/72489344736.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/buwunatixunidal.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/leripoxanul.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/60848283709.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/51959425428.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/gifirov.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/66811703189.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/nilomowemumivojaxitese.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/8982646391.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/tejakutosimidifib.pdfIn PDF document text
    • http://hueide.com/upload/files/tupetarajagijuxe.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/56240389174.pdfIn PDF document text
    • https://uzsienis.cvzona.lt/resources/img/files/33181625900.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/bopuwujaxu.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/86450021241.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1632833238.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/zodofojimobulepafalewixug.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/vexuzanup.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132701082368---kuzalodogoposapomi.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/mesinin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+samsung+galaxy+software+for+pcPDF 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_off0000b09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09D 16428 bytes
SHA-256: f68116f8c078733fcbbda8041fcdd6074f8d0350f3c510ef38a3202bdeca05c5
font_01_sfnt_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 11272 bytes
SHA-256: 348b45f9c17efac2089e94c349814d70d70d3f22bc71c1c207a8fa5213ebad98

Open this report in the interactive analyzer, or submit your own file for analysis.