Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc01b92d59cd9907…

MALICIOUS

PDF

91.4 KB Created: 2021-08-09 10:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 30d8060967704adf244e1f406af5c61e SHA-1: 8a4c810dcb7644d2af763a0da9df9821e4f1f20a SHA-256: dc01b92d59cd9907ab2be607e29a08e64d32a6f9aadeb4c9dc4bcbed3406f574
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 CMS uploads or disposable hosting, suggesting a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://planetamama.ru/files/file/56641441978.pdf In PDF document text
    • http://alrehabourhome.com/userfiles/files/wumojojulat.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965b3f590d4---mudix.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094d5f94ac76---25997495859.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/13749322750.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/wojijilekaxab.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/89718513576.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/50299587770.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/26101301839.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9007c7d34f---rubezud.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/rogonuvazuduwifapimugak.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087c25726430---nisakovibavadejixujiwez.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/e79dff412315608f7c6a1898a83cedce/vomikani.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f14bf1ab099bb18216aebc5ea03c5a4e/gubajumut.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/dixot.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/67467055123.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16074a307618e6---bejimekunafovuwe.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/10c93ee910d69edff3aa246b13513be3/9102382684.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/0d9d23cf401f8de72f69a0703559b326/90452685426.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/matuzeva.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bafb8d236---rabivanek.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/52dea3a311f3082dba8d324c91748d8c/69293991594.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974a38fd5b---9541609068.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/jiladewerigofemuxuzusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=hack+rom+pokemon+uranium+for+androidPDF 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_off0000ff86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10652 bytes
SHA-256: b10ee9613f25e1e54591a47d3e3f75ee7198abdbf2b6d0b7272c6e6c465f4517
font_01_sfnt_off000117d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D4 17772 bytes
SHA-256: 14b9e624cda8762fae31b53e569870c8db3d93c5222612e391ce24dfbfd54534
font_02_sfnt_off00014642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14642 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1