Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c01696ac7b3221…

MALICIOUS

PDF

104.6 KB Created: 2021-09-02 21:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6b7c4fa49775d413c9a4e78f5db3e4c SHA-1: a0f0c629b37b6854c8600c8205942f4b736eb990 SHA-256: f2c01696ac7b3221adb34f1670abf9839a58831aee1c3f68f7412b5de1c4e1b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/1c0e96aef3b320f33f3acd8a68fd8e6f/nolatix.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a66783b5f561b95732da7428da56c3cf/bobixiwe.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/togunoviletedavoju.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608612b2bc423---feriniwozolexudarijebizob.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a372391a9e4---jubokuxiwoniwazaxiwoze.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/178976d34c2d068b66ac57eb13fffa1b/68235413187.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/93752088295.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612b32ac805d8---dutikudepawogomifete.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ftfn5j26g1ck1218ik60m2p5hs/74333501089.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/86855943610.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/c968acf992855296aac0fa594ee60c1e/mevakovaz.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16080ffc226bbd---donuwudi.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/73609821203.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608924b132fb5---42485867027.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/48235650885.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/fufodemasag.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/pibitedufevat.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/54410028278.pdfIn PDF document text
    • http://proxima-design.cz/files/file/pudiradedogo.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/dufipagivebozurawobil.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/52547572905.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/nemaxupufewulepupogigup.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ced0a19489---nidoligotagisopip.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16089bda701a04---fekunasun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=leopoldo+marechal+poemas+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_off00012fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE5 20456 bytes
SHA-256: 5721683aa1098efb87c935eb963cfccf976edee327009656369e37fd754b44df
font_01_sfnt_off0001650b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1650B 10548 bytes
SHA-256: ccea1363c6bb0a2ea9fae6f0875943251b9765b47ceb9d7af5f8f46eff344e4f
font_02_sfnt_off00017d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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