Malicious PDF — malware analysis report

Static analysis result for SHA-256 330672fee4bf7575…

MALICIOUS

PDF

87.2 KB Created: 2021-08-21 13:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bb91ac8fa33bf25aa21c8c04b6214321 SHA-1: d54df7b869d39abb05d048a3d0d97b08c2b7078d SHA-256: 330672fee4bf7575acd59c8fae691b2a1358dcfbed1b30cfc12265a519995798
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of 'natarokedawexe.pdf' and similar filenames implies an attempt to disguise executable content within a PDF, likely to trick users into downloading and executing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d2bb86ecd---61425374168.pdf In PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d74434d871---dinipewiwisakaz.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/198bbf65b1300f1146a0924168fe9730/6000141817.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/46558837677.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6592ba88ae---natarokedawexe.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c428e9c99c48d948613748b7f9989435/jakolilofivofodug.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/nidibonuralupi.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c8491272---firipojuxesa.pdfIn PDF document text
    • https://inncredel.com/uploads/xumumuk.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bijon.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/domaguvupeligativ.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/0419e0d1eb81d1f833c5249823e9009b/dosagumolisexe.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160730c2ebcb23---42394360680.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087435ee7970---kuvegutejuzudijutogu.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c030fcf124---19486901564.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/15901cf35f92631e9b3a2852fc6b3be1/kuxeburofomesi.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/lafopudowebakaso.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87caab8cec---10831612905.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/judr4av7v94moospefn3lmfg44/ginitojopurabus.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4868bb64ef---peresiwogerujirabe.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/54e3fad89009ff4573d3f41bd0d6f9b0/zatezovexesefaku.pdfIn PDF document text
    • https://baongochoa.com/upload/file/11459264451.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/d8f7083864d6affbd3dcf6177acb070c/gubugixopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=%D0%B4%D0%BE%D0%B3%D0%BE%D0%B2%D0%BE%D1%80+%D0%B0%D1%80%D0%B5%D0%BD%D0%B4%D1%8B+%D0%B6%D0%B8%D0%BB%D0%BE%D0%B3%D0%BE+%D0%BF%D0%BE%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D1%8F+%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%B5%D1%86+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8CPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 11800 bytes
SHA-256: 66c4212892750f5e3008e8cee67531c4afbb1760626832e2b0944de9b7cf7fd6
font_01_sfnt_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 16088 bytes
SHA-256: 0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf
font_02_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A44 19688 bytes
SHA-256: 791ffdd474d9804707f8591ed21fdc8dfa47ca721235279842bb01dd76c409b9

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