Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ea3b4086669347…

MALICIOUS

PDF

106.3 KB Created: 2021-06-16 05:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 42e96ab252edeb0eccb338c39dcf24dc SHA-1: 9493082499c2575e4097e75f3c371b2eeebe69fd SHA-256: 33ea3b40866693477969732df31a664a1a781089a1115396f99dd9743f4dcee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous URLs, many of which point to compromised WordPress sites utilizing the Formcraft or Super Forms plugins. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body itself appears to be a lure related to a Telugu PDF title, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://huntic.ru/uplcv?utm_term=rajarajeshwari+ashtottara+shatanamavali+in+telugu+pdf PDF link annotation
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e8561c6b0---pibonadojuluwovomurix.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2eeb35f9---76848993522.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b936521f---93245237671.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/8f8250f66e0f15ba954ace787899fd1e/fexixudurewutubego.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/epfdgobs91q53eae8ie8qm79v7/wubajedinanonikuvafa.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4e8154e4963bddae8c709a3c44b25d30/kigawibidavur.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/rilivenibob.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/56094197074.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/t5nacldkcvd238649ciajiidq0/20454075573.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/genezenatogaruneko.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa88e85943---30550619213.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/koguwa.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/keponal.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210616065639.pdfIn PDF document text
    • https://avenue102.com/uploads/file/zosifuxukifuzewo.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2357934d00---dowogefetuno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 5688 bytes
SHA-256: 21e703958190ea20bb740bb27e3020dc9e989c306373a1e2251ad83e545838d3
font_01_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 52432 bytes
SHA-256: ba25afc8741976483e078bc0b3cc89f71591d9463500f444fdbfefede6ffafef
font_02_sfnt_off00018124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18124 9236 bytes
SHA-256: 456aa00d5b5c8617b5e1f305c2907b73c069173ecbe7daae9e4ee3edeb43fbc3

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