Malicious PDF — malware analysis report

Static analysis result for SHA-256 079aa60c710a13d9…

MALICIOUS

PDF

63.7 KB Created: 2021-05-23 13:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f581dccbcfb327b611e9727cd84f2fe5 SHA-1: 806da847641b5aacfe1b02042cd04bd5d1a63bc7 SHA-256: 079aa60c710a13d94510af680347a258e2edb48bb28e9d87ac17c314cb6b073c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 5

  • 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
  • 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 https://botorka.ro/userfiles/file/demujeresetafidufed.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f067090c75---52559446698.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077da292c3fc---15260017024.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lnr4r7755ndkirei06gggf4enl/39482475463.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/6f9859a7999f589034845addc0fbc48e/narazedaxekemebolerixewu.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eed1f22698---namalegidomevibiw.pdf
    • http://booklandbooks.com/userfiles/file/99181661639.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/f3c957098e9c0b7e8a7cd51058177a95/jadosejixe.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69928c3117---29852762713.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e5dc7e4f70ee514af6b53de6839079b1/82402382341.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16076a1c0e71ff---batolejazixafedidoxixe.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f20577eebe---81692614293.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/c4f14accc67da7969c6eb9533bb266c0/sexage.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/3n3c54krnc94qugn3c9lrbis26/muvirewiwoboxi.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720adce1bf6---78318383305.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848cba28cbb---89051693044.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=%25C3%25A9tica+en+los+negocios+manuel+velasquez+septima+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46f.bin
de5ba94fc39ea43dd86b5d0b65e1b4a51b060bac44df05438a2b2b29c02263c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 5596 bytes

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