Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20d717f9fb9ba34…

MALICIOUS

PDF

96.8 KB Created: 2021-07-22 14:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0e5e9845d4a2f2a4b702df3ef2ab6c10 SHA-1: a524bb121c31e2f28f0821910f4aeafa01eb6e11 SHA-256: e20d717f9fb9ba349f1f412cb5b0da7a7b4fc106e0cd636257b8a111d8e81ba9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

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
  • 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://lamachine.nl/userfiles/file/87193207349.pdf In PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0371a2ad3---sezegiziwi.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8242a2017---figemeko.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/60122138253.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/uj9l8k4ra5brkginpa6fsr0723/fenakalupulukebaku.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/gibogel.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/78348936485.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070885e28b71---98927769660.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/26eb7ee29d862c8329101d88869e429c/nenakileda.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/fazokakirimudasidawebawe.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/4744193646c580d21c9817c9f8014299/wonimusisofakedegu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e0772da69ae---86232167925.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/27957573872.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/u9omip1bmikd3shhk0c6kc1son/zemuxolivonezetir.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/kukejazalewerow.pdfIn PDF document text
    • http://jucal.es/images/file/sutasozipex.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/suvegobixukimagidu.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/52338368115.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/79551805485.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/42709addf505aa97bebd0670e4dfa795/81138786957.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/80054478673.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/03d6505fab5edb46fd1b433402d93ea4/tezewafejiginasonemoganor.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/komexedoxovefi.pdfIn PDF document text
    • https://tusenfotingen.nu/anvandarbilder/108/files/5225535428.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/46460766587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=songs+that+make+you+fall+in+lovePDF 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_off00011455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C67 18384 bytes
SHA-256: 1d3ca21315b3139dd44ca53b9b0af98e28a5c7cc1092fd8bd0b30585960137ea
font_02_sfnt_off00015c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0B 11008 bytes
SHA-256: c33a3c9a127d31f5611c940f07a62a85975776819df889a915fbbdb023354912

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