Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5949bf75ec9ec8e…

MALICIOUS

PDF

85.3 KB Created: 2021-10-22 19:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9f5729a4b3bb5a0fb65bd804c04f00bd SHA-1: 494959d94f00c0e9d008fec93467c5c5d4c85c1d SHA-256: e5949bf75ec9ec8e28f9ba19f8727408bad3cff0dfa481c8c21e1267b7443592
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised websites or disposable hosting. The presence of a 'Password-protected archive lure' heuristic suggests the document is designed to trick the user into downloading a password-protected archive, likely containing malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=my+whole+entire+life PDF link annotation
    • http://staractivecollection.com/resimler/site/files/74422664238.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/1886333105.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/22546796491.pdfIn PDF document text
    • http://melabo.com/upload/files/jifunezamimu.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/65394830734.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/nobutiz.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210911010223.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/lixuxuturobejudovalivir.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/67701146039.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/tujexunojuwev.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/84213839484.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/14251012726.pdfIn PDF document text
    • https://westech.solar-napkollektor.hu/js/ckfinder/userfiles/files/kepejobe.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/kipitiwo.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/70132432364.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/3121519576.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3afd4c4eb---kokil.pdfIn PDF document text
    • https://schmitz.cz/res/file/57383269267.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/72280349927.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cdf862cc12b7574268eb08ceec9017d/ziradorororasu.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161474f233805a---rijivapuramuzatunikoru.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/50139347804.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161439527d988c---59338251792.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/c2j0s7oa9ji6kohs5ucmafto64/73318360279.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/worovejodexawapubekiludex.pdfIn PDF document text
    • https://bientannamhuy.com/wp-content/uploads/files/zafakomufuxogeditumixebe.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_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 18160 bytes
SHA-256: 9d4fbfcbbe01c0a711b59db58f058ba5e2fd2de83956a1a34623c494025355c0
font_01_sfnt_off00011896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11896 10176 bytes
SHA-256: 4a87e7762959db53b763a030d59b079e941d2cf34fd279e3dbd6388b6e46e749
font_02_sfnt_off00012f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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