Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd6b4acdadc6325…

MALICIOUS

PDF

88.7 KB Created: 2021-06-29 20:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd213ce7f539820c040c31f4bfd56182 SHA-1: c6c7a51a8b5e38b7fb647dabe512e4be0c616124 SHA-256: 6cd6b4acdadc6325fbb23b21655fef68ed03fd3683d698f59525a60e3928a5f8
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, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=how+to+take+off+glyphs+wow
    • http://kartinatv.org/uploads/files/74995153670.pdf
    • https://notrepanierbio.ch/userfiles/file/rifunudewe.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/813625b4a89fda36b747249358a5e4b0/90117398184.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d981ec83252---soxanibumoj.pdf
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/mimifoto.pdf
    • http://emilygrilltogo.com/uploads/files/56461150543.pdf
    • https://ancoraeducacion.com/images/44193427125.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/65436810074.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ed4ce9db466b83cf72d67ef839a5afa9/74564590988.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/ea4d47f84bcd6072e4ad3c7f0ecdad10/gewurusatukuf.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b747a2b67c5---67638068592.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/fc64c3c934339428f3d24503a541ff89/89057010399.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/d5b04d334f9348ca4106c39a3b2cb984/79056945726.pdf
    • http://altelaw.com/uploads/image/file/guros.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb80ba70e24---xutawef.pdf
    • http://podiummoda.ru/userfiles/file/65555227579.pdf
    • http://barcelonasixtytwo.com/userfiles/file/zamewaj.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed7f461d89---30167301559.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0605/e76ffe5d9e9d6109f0cdce6aefd3f040.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/cnfftmadl7t2qvlcgjvai8v4fh/28224292475.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/09925f513626160291c819fed9159d5b/tufidivazekunawaj.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607772ee824d7---17020496603.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/27406823935.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b56e4eb9f3e---wewoludati.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ee.bin
8b017cbce0c76ffaabeafe35e3cae756104b4733a44a463bb146be3edf8ddf88
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 17768 bytes
font_01_sfnt_off00012375.bin
6b87f09f82b8a175480ae5c1fdfe21e166c814327e1b2fc97bb7f43c700677c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 10624 bytes
font_02_sfnt_off00013c09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C09 16792 bytes