Malicious PDF — malware analysis report

Static analysis result for SHA-256 347f11de997ad3aa…

MALICIOUS

PDF

105.4 KB Created: 2021-07-08 10:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28af81554f847dfc4e936ba9b6d04431 SHA-1: e91e369d0141cc6b7d508bab844e806e94b89e0e SHA-256: 347f11de997ad3aac4d3bc35263139c219cf582945dfabb1610ef2f964b9d0fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://laborke.ru/uplcv?utm_term=definition+for+taut
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a236a0a1d59---41602059946.pdf
    • https://muratay.nl/userfiles/file/zekum.pdf
    • http://locthanhwindow.com/img_duhoc/files/19558357628.pdf
    • http://steakclubhn.com/campannas/file/10182300415.pdf
    • http://afgventuregroup.com/cfiles/file/rujufu.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ddr6pabu04i2rqcvl7pu50idf3/xusolixedumala.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609264e0847b2---rixezerakewikibomipud.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b35de8683---vuxumadizufe.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5d409047e---68900491856.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6cd89ddee---jekumexinopafapelawosog.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/uhrb5h2l25dg4mvdl9mgr9518h/46081731320.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d03c6901---85684114924.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b73d4a23868---bemuxibonibufijatokej.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/dcp4ibdmrsfeua45qu9aiiu3br/77618353755.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/tikalosawofasuxom.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f64a8d0cc---pederexudidanifawe.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d6863de2e6b164083746aedb32a47efe/tuvivute.pdf
    • http://esipro.lu/userfiles/file/43948775492.pdf
    • http://eiak.org/upload/editor/files/jabuwobunutesajizive.pdf
    • https://iword.de/userfiles/file/96984760268.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9419580b9c9398876d763672eff2fa83/likanobepazoximateru.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/83911c8de4a30c0337e1040f09fa7323/94152390393.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/bemibitodudesara.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010a65.bin
4f509392e893b5fad54859ba8baa124a158a8d643e3a5b1dde592eeab6ba3223		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10A65 18776 bytes
font_00_sfnt_off0000f3c7.bin
cb1b02dccafa6f9c244b7c449fc793c3fc35ad62345a3f46cc9dc51271de64f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 10096 bytes
font_02_sfnt_off0001291a.bin
3b2ce90b65b8a7ffaaa5b386bb7626ffc83479647240b1f048ae2627b6d3a499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1291A 5704 bytes
font_03_sfnt_off00013d20.bin
bcf273f9c3bda252c8fb199a1aa857347c28a3654ae418539811f29f8e7895ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D20 27100 bytes
font_04_sfnt_off00017e10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E10 16792 bytes

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