Malicious PDF — malware analysis report

Static analysis result for SHA-256 9069e20d08e241b8…

MALICIOUS

PDF

105.2 KB Created: 2021-07-06 02:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f0dc90cb9462ff3134ac804ae612a7e SHA-1: 7d1be1ff1f6c67867d0d3400a3a2a2aae620c398 SHA-256: 9069e20d08e241b8d890fbe18dcc449f5391dc8c8fca32d477e700771d20d6e1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/zupikuv.pdf
    • http://dothi.info/images/files/84250917938.pdf
    • http://elmbbq.com/uploads/files/gitupa.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/1a4f73d9f73ca95cd0bece859e211794/41471847332.pdf
    • http://karpatskiles.ru/store/file/53856587795.pdf
    • https://vietnaminsight.biz/ckfinder/userfiles/files/zewukukosevoz.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160721aa370cd3---kizulokekobivo.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f4dab75f9---pidirajewujojaxuradugosob.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/78946678739.pdf
    • https://menu2uplus.com/images/file/tekaredagulumisite.pdf
    • http://showplus.ae/userfiles/files/62957871322.pdf
    • http://sklepjola.pl/userfiles/file/kazajurogitufopumawunede.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d20a32ca---50478742981.pdf
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/silugomube.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f29fd1a96---balatisowefemegoku.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/9ic7449cj3pjhmtn0tdcj26gm9/60452692495.pdf
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/79759463016.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d0f83f73e849e6578129811466579acd/nepapowito.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16098e66901aef---58287388889.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c90459f1983---vejapuv.pdf
    • https://abe-rdc.com/userfiles/file/bivuzafotikofisomivisu.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c29b0081dde---kifabirumig.pdf
    • https://betenenergy.com/sites/default/files/file/79671751122.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/190c44cebe3d69acb749957750112ae0/34316060760.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/265b5849d03f85eeb5dde63bc01229a6/fedud.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0aa5a75f---65723474094.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=flame+atomic+absorption+spectroscopy+diagram
    • 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_off000136d2.bin
2952b9f1efcf2dc4588a05093cf6cc02bb5c6802ae86950260670eea5b550822
pdf-font-stream PDF embedded font (sfnt) at offset 0x136D2 17776 bytes
font_01_sfnt_off00016584.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16584 16792 bytes
font_02_sfnt_off00017d9b.bin
2c1c83915eeaf30d76c100b5b1f92d5bd6dbc4c79250ece580f65356fb01cad1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17D9B 11088 bytes