Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a06bff9228a33e0…

MALICIOUS

PDF

90.1 KB Created: 2021-06-27 04:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 17d4d37942beb3b6186e2d2a56294dcd SHA-1: 3e6fced750c094f7a80f1e03958772d6ab5857d9 SHA-256: 8a06bff9228a33e0837f2afa1750b1a575f4e4f328ea485afaf599dc67fcf269
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ddrwc.net/clients/869849/File/gufesirazamufegisitoguliv.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/lvoe1peepd17a8iv6ud2qolc43/fitifupunilasolojasaxozo.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160839c576fb74---giluvefuti.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dff50d3cf---84475030112.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/66013401775.pdfIn PDF document text
    • http://cycling-software.com/files/file/pavexigeg.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/44091618724.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//705808232.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/08cr66lm4livlreq148f31g8g5/botatukedetakevenot.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc276d4cd4---67742655237.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfdfd8cda9---55549894488.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7a97554114756a5a30d8d1d6a76c3134/kepuzokado.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160839a2e97029---45544714201.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/26566859684.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/rlurjcc7vhrc896c1mm3ddfh8v/mufofabosusurivupegen.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/xedaxud.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/88347641350.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/nitorokuwitopakuwopusu.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/55ada03d9390316fd0dedf560373d511/xefamuvulaperisadatex.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c147bbdb6fd---vuxumomuvape.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc988c7c4ac---tabagajolajiwajawitewibu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba89e257ce4---sovejiwotedemofikapa.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2540b0ec12853793771bde460ed6f544/zuzekuwomewibag.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a9f84a82---muwugukebofegezoroze.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/85655744895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=nfs+most+wanted+2005+pc+game+downloadPDF 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_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 17348 bytes
SHA-256: becfc8cf89f10bd2f81643bff698e0c7c6b81c4111752ccbc3229565b2d3fd59
font_01_sfnt_off00012885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12885 11212 bytes
SHA-256: 81ef4b349c9068b9d13604829d7e2ec9a74787c9b661258dbb9871681f79bf74
font_02_sfnt_off000142be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1