Malicious PDF — malware analysis report

Static analysis result for SHA-256 6290cfc168745ebe…

MALICIOUS

PDF

93.9 KB Created: 2021-06-26 01:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d374dc87e7e9a489ed583eaf1703daef SHA-1: 9f48399aef683f60ce4909c38102e74f3d8cd495 SHA-256: 6290cfc168745ebe32f964a2b44feee9f1caa434e5f310631a9c29e278078868
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c952e28520b---kipokavoxawinuxofunajita.pdf In PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/64fbdfbfe03aecfa44a007c0d756fb83/favizerijax.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/tekudogibutiwuperapepu.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/dbpte3vtqb6uma4i1eti2dnn10/foleda.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/xekuzubo.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cadc5082c43---73263459913.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/dm1sralenasuj37n57ea0hd1g9/59719120922.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/3po0i8lu4ovrpdd84v8f0i39p4/vajin.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/fugazaletoxogudix.pdfIn PDF document text
    • https://educhina.mn/editor/files/noborezotobovim.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/3b51e3c75db3f798de1f9bee52d8629a/toxozubuparesavo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4dd498adc---75252288030.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/iflblc2vridrhpspce6df439ns/97179131236.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/3f0d9c789fb408e143978d9545518d91/fesetudilifukowu.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160987c4d2f94a---61018956719.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/kosilidojogexe.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/tewudotaribofokidok.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/marazikaxasa.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/44b3b0552beb01631ad1e30aeb884d1c/ravenetutetulo.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/gaponutumerezijejosepa1623223660.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/12480555871.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/metewunaruzaputiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=sao+fatal+bullet+how+to+dual+wieldPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 18104 bytes
SHA-256: cf8738bb294c921c3728456408c9a6d87186576a32fc939e3da8fb3bba0df4d5
font_01_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001359d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359D 7736 bytes
SHA-256: 82b6e27ceee3ef0f9216729757e31fa5c54905f16f05731f1085d922c1ef502c
font_03_sfnt_off00014ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF7 10480 bytes
SHA-256: a386ebc8d71c0123c01963d0c23ea291c5902f511aaba3f110f4aec450191f0f

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