Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f526582edc44b6…

MALICIOUS

PDF

68.5 KB Created: 2021-09-24 20:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5dc572add2129a0657f592c4a4dc41b3 SHA-1: 09956ad3377db64868068698055dde3b9d95dcab SHA-256: 63f526582edc44b6c5f8115c0dd0002504278d95837787ac0040ade9f7917956
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the large number of extracted URLs indicate a strong likelihood of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://ecohort.com/userfiles/files/1375745626.pdf In PDF document text
    • https://protrialse.eu/files/files/dexomo.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/tunufobadutipeliven.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/sexinenofod.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/20249855556.pdfIn PDF document text
    • http://nature-revive.org/files/file/88552195995.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/xivamipegiwoni.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/84089955653.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/balonomanipuxajixedow.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebc06e94ec---gulure.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/33639176131.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/wasezesimidufewojewapup.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/gadofanuj.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613a67865b652---69801400141.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/buzijutabatuf.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/57791174338.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/13586739755.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/revajutiruxabatesidaxaru.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/nakaxebegopipesabisa.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/69123331827.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/dopituzimupulusuku.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/97997376967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=baldi+unreal+basics+apkPDF 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_off0000ad25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53C 10676 bytes
SHA-256: b0f855479eaf1fd41167a85024830740c5dee56625e99fb36536c0e078436836
font_02_sfnt_off0000dd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 15576 bytes
SHA-256: f16ed882c489b289008dc44a2245a2ff4ac117d0753d21b3b578af0fade7943f

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