Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e08acf7061e7cc9…

MALICIOUS

PDF

72.0 KB Created: 2021-09-26 01:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 894b932b0dee0ac2ab52e68426fefdfd SHA-1: fa32c329a4609fb514cf7489dc0d2b24b11537ed SHA-256: 3e08acf7061e7cc994177ed67225f34d094e8dc72efaaa5281383a65e8e7f5b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The embedded URLs suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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 https://inwebjor.ru/uplcv?utm_term=how+to+change+your+location+on+android+phone
    • http://fonnepal.org/userfiles/file/61686500004.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0b4b70615---55151885873.pdf
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/69756822060.pdf
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/nonewizan.pdf
    • http://www.cda.org.hk/ckfinder/userfiles/files/bufuwatuzawiwibufu.pdf
    • http://brilsports.ro/userfiles/file///xomuxafalijotonote.pdf
    • http://newgrids.com/userfiles/file/rabogekewaworekatiwo.pdf
    • https://webmanagement.jbclub.ro/images/file/zisiwetudigilin.pdf
    • https://hockeymro.ca/docs/file/87735936343.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322a1b56d46---tireni.pdf
    • https://soechi.id/userfiles/file/56008163781.pdf
    • https://aneri12.cz/res/file/38153420254.pdf
    • http://jinruily.com/UploadFile/file/20210909024243100.pdf
    • http://viajaconsciente.com/imagenes/userfiles/file/sibetedijakela.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/boxixirakakatufifam.pdf
    • https://506hlapeta.com/files/file/29906283767.pdf
    • https://euforbiabulgaria.com/uploads/pages/files/85936412685.pdf
    • http://arebiatours.com/uploads/files/63447752268.pdf
    • http://h-n-s.net/userfiles/file/fenebudegibefivigonixu.pdf
    • http://originalbau.hu/imagesfiles/novawoxigogusagejabepokiv.pdf
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/33617226501.pdf
    • http://amidoux-peintures.com/ckfinder/userfiles/files/52860934841.pdf
    • https://ubitanduk.com/contents/files/92014292133.pdf
    • http://rsti.biz/files/fck/file/gebiwofogaxenaxeduxuto.pdf
    • http://austral-immo.com/userfiles/files/jonevivanivotatiwewilig.pdf
    • http://v-lukomorie.com/uploader/files/8556619243.pdf
    • http://bestpokeya.com/uploads/files/nogovotojumeso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4b4.bin
fb4f9670d90bc42416677b76b42630dfec775716d50af9c82842c9bb94f98c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B4 10916 bytes
font_01_sfnt_off0000cdaf.bin
d04d832841689e68f7e92fa881600631e3aa1c93dffcf882c7704ebb8604efc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAF 17200 bytes
font_02_sfnt_off0000f9b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 16792 bytes

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