Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00de8bd847fa106…

MALICIOUS

PDF

84.4 KB Created: 2021-09-07 02:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e11611612f160e628fdb9ba8f765c8d SHA-1: eae489367b10536a33712f5bd03fcb9cb5be7ce9 SHA-256: b00de8bd847fa1062567950e7d808dc2e030227edd12aff79287dd8da8ff2356
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, indicative of a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves luring users to external sites via these links, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://infrive.ru/uplcv?utm_term=sonnet+18+literary+devices+pdf PDF link annotation
    • http://dataction.org/demo/dataction/media/53780707273.pdfIn PDF document text
    • http://soles2walk.cz/data/file/diwagilolepip.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/pepefajelifejutava.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e47a0ef266d---14258716576.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/1e4d2bb8bf9414e561d6121554da6804/74994970836.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/5528190468.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/66cf75b32c456eb4746dad51149c8567/63970485558.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/tuguwefi.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/petifowuki.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/fevowenanifami.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/66584050463.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/19404082578.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jofflk60vl9h02nsh39dcte68c/guxorozojodarulubesad.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dto12nkoe6hhck9jeqib8q6ugd/43772385079.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/90772876036.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/pudodivovofefotunolaxal.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2ccbb5920---71300439397.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/wadexideganewe.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a312cd1c327---legexujezavovobarusowag.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ebf2abd3d---31980801707.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/onb8aj9u7tksfqd8mnr4el4kn7/97665418077.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/cb7825ec59382b8443d20ac0c49fa9c7/tozibakozuvitinim.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ce9ccb70---54595995886.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 11128 bytes
SHA-256: 725db13513affc229cf1381c6c7e9544981097f05b3e54213558e1e93e005005
font_01_sfnt_off0000f96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 19556 bytes
SHA-256: cb4ab27a1e7e3c99db062263454418a587422d73d7fbb33c625fe7ac0baf3013
font_02_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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