Malicious PDF — malware analysis report

Static analysis result for SHA-256 7880b5120788b529…

MALICIOUS

PDF

78.7 KB Created: 2021-07-30 23:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7277b644559be75ed3cc5cbe59a083be SHA-1: 734e8693e8e3a3e773c46abe5e962b5f9b26b4ee SHA-256: 7880b5120788b52908fefc388854a8733f4585923d627d00715ec2f47abadf3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to phishing sites or download further malicious content. No scripts were extracted from this sample, but the overall structure and URL distribution indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wastran.ru/uplcv?utm_term=gta+san+andreas+g%C3%B6rev+atlama+hilesi+youtube PDF link annotation
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16078b49356095---57797466390.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/c5aa716c8c4b0840d5069581bc97baea/1862958030.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/61865146706.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a605f7318c0---rutetudawotafusafo.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607de61e025ee---povevediduluxi.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/16726389697.pdfIn PDF document text
    • https://xistenze.com/files/files/11968491755.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092bb7da332e---vonexofifoji.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/takoluvevulefelaberefikog.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/toliv.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/51495661370.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/21624171757.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/fabefisawif.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3df82c9f58---dojojezulurewezi.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/wotexatatufaxaxi.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc50a033605---25257713787.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e6d268c2fc3c7f65482cd751646918e5/53538232789.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/43986730080.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/947d92d9eebd1622d8fcc76c66b521f0/lugaterawul.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/6487796769.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/jakigozimale.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/kekotilewotowalude.pdfIn PDF document text
    • https://afayl.com/userfiles/file/23003969971.pdfIn PDF document text
    • 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_off0000c9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CE 18576 bytes
SHA-256: 6c8a2a51fa3d334b5fcd274d2d4434dbeba3c28612c90bdeab2357207290a91c
font_01_sfnt_off0000f754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 11368 bytes
SHA-256: 6a195398e5b1e1fd950eadd5ad15cd99efaeb42b6f2901851f347312dfccd453
font_02_sfnt_off00011161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11161 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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