Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a256abb5e42ca6…

MALICIOUS

PDF

75.1 KB Created: 2021-09-07 08:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f3fd987803e0603ec078513c765bae8f SHA-1: c90cfc830672a0eef81b6d52ce84a7ebacb08e3b SHA-256: 12a256abb5e42ca67bf990111653a463e9d7b7bcc3a0abe4b7c81c71c2ef3872
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites hosted on disposable domains. These sites likely serve as landing pages for phishing attempts or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • 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://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa53cf9f8ae---12087863650.pdf In PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4e725d158---28425895464.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/sibumobipoxowe.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210802125442.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/84078682908.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/96296428714.pdfIn PDF document text
    • http://seamacros.com/upload/file/xevawexuwar.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a142a26f5d9---8882031566.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/nubanafusipirinaxofelel.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cfac52cc6f8---lepimilosuwexugubev.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/77261097413.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/87730253172.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/xodatolutidusatoxobe.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/5897631215.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/vefuzidelepori.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/689f53c29c3173dce06f456e6c7a8dca/2077797710.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/60388148562.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087a6590cd18---dugutazixexorumokulujumod.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/80784058253.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9ccecef8---46194667683.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/visawomotuk.pdfIn PDF document text
    • http://ndt-ultratech.com/files/lilimigonudome.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861db9d7e2a---45738186301.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/petoxedoxuwofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dante+alighieri+the+divine+comedy+pdfPDF 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_off0000c175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC175 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 11080 bytes
SHA-256: 02ae7ccc01940f3bd839a4f4d09cfc63bfc0c7d47d35eebfe3b287c4a5d59758
font_02_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 16972 bytes
SHA-256: ee05bad8c76b470428332b9c5dd2fcf159cca1a767558089b7071cc809fc6476