Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e14924c2fc8096…

MALICIOUS

PDF

86.9 KB Created: 2021-07-20 04:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 700890a3da0d054cc7468882afbc2f7b SHA-1: d0bb98162b5a7614104ba4ad150a9e89a5e8e896 SHA-256: 96e14924c2fc8096df3ba8d7a5166b52d3e4c9a1ebcf64012528a3eb684faec8
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The presence of numerous links pointing to compromised CMS upload directories and disposable hosting suggests an attempt to redirect users to malicious content. No scripts were extracted, but the document's structure and embedded URLs are indicative of a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://coil.hk/upload/files/fasosozagivifobevuwusifuf.pdf In PDF document text
    • http://adaviestransportltd.com/userfiles/file/64836453512.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bf11b6f51---gegefiwenid.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607736142c309---pejawafo.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/89041998742.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/68d17f600d604a1fcca9ee065565e831/83825109887.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/tekuxasivemodubopizipo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/aec05367b7f3f08bd3ac8d4580947efc/zizumovemalapowatozaga.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a70931f5---64898788789.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/67866448390.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/16609531631.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c00d034e997---50484541025.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/40810113519.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3edcaff217ab1a96d4739dd87fd7d59e/13679516685.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/68173787813.pdfIn PDF document text
    • http://shshalloffame.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/wetumer.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/61590680859.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160808cd63ccc0---75749493649.pdfIn PDF document text
    • https://jagominum.com/contents//files/87040878181.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/kovalenuxezesazo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16071254ce3727---68440782347.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/jovenilegaduzi.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b9ae32553---taxajeze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=is+yeast+alive+in+breadPDF 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_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 17132 bytes
SHA-256: 23aff8b7d88e0bff976650a15b3c620b04370a9190b24612f81450f82b1579ae
font_01_sfnt_off00011eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAE 10392 bytes
SHA-256: cab1c244398006d5641bf391972695f6067a2751274b0787d9d57b2bda5cf280
font_02_sfnt_off0001365a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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