Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf60647d2eff4d8d…

MALICIOUS

PDF

93.3 KB Created: 2021-07-02 02:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c249f64c6f68ed54588b32b0eafa901a SHA-1: d9c64ea2dac53d930badb0a3642e8ebce91435a1 SHA-256: bf60647d2eff4d8d35549f6546c30e29303951ac422900dab94044c3c54280ca
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristic firings and URL analysis confirm the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad69274084c---mamogagote.pdf
    • http://sportgalaktik.sk/userfiles/file/40952461595.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e39c9c8687---86279777781.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160925cfe10a37---40498213118.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4927c0b00364094d827144d8bf57feb4/zafoxebifa.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cceea72b81---fugopisuxitaz.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3ee04d2ce---31306748103.pdf
    • http://liubeauty.com/luutru/files/rilanunologi.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/da13db120dc4d03abf5564396d690a8a/mefixoz.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/gnfa516cf9kl462kklan735kge/11801642030.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/3b566b89738c7e00dccb4283c803c062/voduborotevuwotolomoxilem.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/bd0931677c10a431f55db727b8c06371/boponodere.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/84dkgeethd7doeog73378s2r67/89468481048.pdf
    • http://mywayrtk.info/userfiles/file/15944096009.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9570cec47a---28615742773.pdf
    • http://mea-travel.pl/userfiles/file/tiboxigodakubutetofuxo.pdf
    • http://clubselectionvoyages.com/images/file/xefoguzabefegabibuxujaja.pdf
    • http://angelescare.com/userfiles/file/47712929356.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed74d15c2---39460581043.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f8f08b7bd0dbda7dfd423da4f3262c4c/22497335835.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be728e56f40---70028901594.pdf
    • http://bensonlandscape.com/editorData/file/nutoxixavoxonojin.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d155831d07---62261420327.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=boiling+point+at+high+altitude
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19d.bin
06f1d5f5a9083a80364da0885936c8ddb2848b41a67694407b5e75bff462a068		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 16616 bytes
font_01_sfnt_off000108e0.bin
ffaf0250d038f4bc951145bd8f555413c68787e2a98c8bc4c924fc99be1390cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 17644 bytes
font_02_sfnt_off0001376c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1376C 16792 bytes
font_03_sfnt_off00014f83.bin
c17a93e8da774e7fdfeddb6da46d5d678c557c5da7dbbce24e65ae994830a0af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F83 10556 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.