Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a72e2ea265a317e…

MALICIOUS

PDF

79.1 KB Created: 2021-10-10 10:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 40f339d97aab9844483eafa4f5b863e9 SHA-1: 65f82b4c9f38d2d3e24ad72864c73e07ea702b4e SHA-256: 6a72e2ea265a317ef8a41e926484851c35dd77bb8ae004efa76472ba4a2a666b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains multiple links to potentially disposable domains, suggesting a phishing or spamming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://gymlesgeants.com/upload/editor/file/rogimuwodefujipasakaza.pdf In PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/kozisubebi.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/4968571630.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1616269a087d54---76226552845.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/77197872872.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/xexawolukagofemepoworasif.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/torejol.pdfIn PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/rolubawiboxufa.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/52672864430.pdfIn PDF document text
    • http://ned.ru/uploads/files/56389107779.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/tufoxetepagixixexolujipux.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/zokixanuzufametixuje.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/fidadejimeforepomotuzefi.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/xilake.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/39970570963.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/zugepepagep.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/58990557731.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/jujajonoru.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/22288250850.pdfIn PDF document text
    • https://digireg.dk/upload/nojupaturovapen.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/72505963417.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/67966264010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=hands+reference+for+artistsPDF 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_off0000cf00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF00 10416 bytes
SHA-256: c688ff631a7da520eb1e323ce4beec0910ad2750cfea816f17653377bae05f7c
font_01_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000febb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 17944 bytes
SHA-256: 6fec0b36a6ff96d948cc8c49521b2a5cae21cdb9d848ce296a8c743636909c66

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