Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b2af99eaa8aa87…

MALICIOUS

PDF

73.4 KB Created: 2021-06-11 20:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1bad88367c553fdde1408492b3627784 SHA-1: 933abd10009c1c5f47d794cc8bec8fb2ebd96315 SHA-256: 30b2af99eaa8aa873f7be9cac1a3c59040620cbde052022e544e67e7c5df8b56
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7615

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=best+calligraphy+arabic PDF link annotation
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ac3466dfe3b7357b110a68ee7b26ff22/71453836610.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cecab81f0---ruwokenuxumo.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f62796446---poresuzemekit.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/f07341df6ed997e0bc6493f1f3dc2eca/lonofumizezikelimugi.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/xakoreb.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ci5h6sght14medf23lt5h2njc1/nuxikelurujubigobak.pdfIn PDF document text
    • http://abnicum.com/files/file/lalawudazujoka.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083cf0968677---86176782091.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/sufukusosavebofiku.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/19548770539.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d88e78cfda---wedusitesaw.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/08c7cd05f096811c7cf43541cad9b341/sodebatexibuxiroriwoxol.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/46394035188.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE85 5488 bytes
SHA-256: 1789245fa7c281b2ec2d71dc4a16cf4fd10d969e5d6847528d2eb7a635716476
font_01_sfnt_off00010133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10133 12172 bytes
SHA-256: b819dadd7e586575ba1bb5f27c4dc048f0fdff97e3c2038243b7c3170d90bfbc

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