Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3bce94c93a4d81…

MALICIOUS

PDF

81.6 KB Created: 2021-07-07 19:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1f5e80ee4404139c4a588c51ad7561e8 SHA-1: dec6aeb80147ed95e3b5d4e46485f33bdec77513 SHA-256: 0b3bce94c93a4d81dffc884f48ae9f4788cb2d5c454e4b27a6cde9b12fdeaaa2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous links, including those pointing to WordPress upload directories, suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://inwebjor.ru/uplcv?utm_term=how+to+draw+patrick PDF link annotation
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/8oudfk2oarpqq5lno8gebfd5b7/gumosikumezizad.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/83661163429.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/950e62583f16859085c2ec4cf1df108a/49090425339.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608151e2c09b9---60445848511.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb535cb28e---38314946636.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/13871047899.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608406f30187f---wixajewitokibejozelor.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/22927090628.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607712f45033c---fimolusuduxodomikefa.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/koregerimu.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/47448499282.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/25700815072.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/93214782383.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607621de747f3---zuguvozurupamupuzekigag.pdfIn PDF document text
    • https://andrejc.si/files/file/sitokoki.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/88802775663.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16088fabee65b8---63115043534.pdfIn PDF document text
    • https://sbufficio.it/file/50534908344.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/88011476579.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/sodilikede.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160753b506653c---89700176044.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc339a02f4f---55079031576.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/puvenafu.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/28146638441.pdfIn PDF document text
    • 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_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 16948 bytes
SHA-256: e8006db71e2b4ad989a2d34132a800cfcc16e5d3e5065ca1372b0921db057bfc
font_02_sfnt_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 10224 bytes
SHA-256: 49e5bc5e1e1bc73f9551beaa8c994a260a6e73d8a5177232b3ca724b0a20e9aa

Open this report in the interactive analyzer, or submit your own file for analysis.