Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d8663077bc5d09…

MALICIOUS

PDF

142.2 KB Created: 2021-06-26 05:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6276dab921787a2bd001aa2c0338827 SHA-1: 359840ef7522f8360dc0ae20e10db2b1de1529e4 SHA-256: 09d8663077bc5d0900446412052d29c4ed0c39b80af3086cd771723a8aa20419
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly point to a link-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9107

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/af3d6e91876288ad276e1add61dcf57e/gekowuborikuk.pdf
    • http://51www.org/uploadfile/file/d5090dabe9748b2bb2a1b424d727f6dd.pdf
    • http://aktifithalat.com/resimlerfiles/vubutogajur.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3a27c3ba9ab864c7a8685f337a2a5ff9/81296525136.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/jujavabasifalafebonuxajor.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/efbf83d883ef3b24190316a7f27a3243/32383472068.pdf
    • https://baobihungphu.com/media/ftp/file/87634427579.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/wesirazepitifipegapevexug.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d479e3c0b5---43994372718.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c15e55a240e---vepenulopikezafaji.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fa168f45f---nunoxod.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe6166743b---15511575519.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa67e56ae5---foxef.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95ed927cdb---pawoludelofitozurik.pdf
    • http://alemotta.com/resources/original/file/vabapo.pdf
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/jamasavokuvumisigut.pdf
    • http://mega-stainlesssteel.com/uploads/image/files/wojogetuzekux.pdf
    • https://asiarsolutions.com/userfiles/file/kepep.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/9b77ee19f692618e4598f168639b5af0/gadumazalug.pdf
    • https://soalmatematik.com/userfiles/file/55014653911.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d1a3504dc80dd0c2b69db21be86d38b9/figubopurowunusenibab.pdf
    • http://broadmoor80.com/clients/866172/File/bozizavodenabunukavab.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/r9bep4khvpdro9tt805fp10n60/82134391352.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724b0b895ca---76312683094.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=building+pangea+gizmo+answers
    • 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
font_00_sfnt_off00019e09.bin
7b0ca8e4f7e13860baba4caeef09e9246194d39eab86e3e602bf139cd8dfd656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E09 1892 bytes
font_01_sfnt_off0001a6e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E5 16792 bytes
font_02_sfnt_off0001befc.bin
db62eb31080da766bec667613da9055cd0dba329f40caa2d7b3c14eadbec3d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEFC 10936 bytes
font_03_sfnt_off0001d826.bin
cd0c6b41f890f8811f0309cd03fa44b8de5855a46a437322fcc654184f224d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D826 23952 bytes
font_04_sfnt_off00021510.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21510 16144 bytes

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