Malicious PDF — malware analysis report

Static analysis result for SHA-256 9618b69042d21bd9…

MALICIOUS

PDF

86.2 KB Created: 2021-03-25 16:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 31bbf6d115d11340196aeeb3d1d53556 SHA-1: 9f51f12aaad7ab716b6f21546674ff484b1890a4 SHA-256: 9618b69042d21bd92047d92a8ba3f7c7eb1866693d3d13dae12b066fb6af1b7b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://druttle.ru/123?utm_term=puducherry+tourism+pdf PDF link annotation
    • http://roxelejabojafe.scienceontheweb.net/befadiwevase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_60336c97489a7.pdfIn PDF document text
    • http://goodshopsales.xyz/how_to_use_pentair_intelliflo_variable_speed_pumpw5g6x.pdfIn PDF document text
    • http://reduslim-eu.site/28780176233we3ep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394077/normal_600589fb4ace9.pdfIn PDF document text
    • http://help-business-media.com/quill_the_life_of_a_guide_dog_full_movie_english_sub331ht.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/90853860291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416929/normal_5fe83b0c21fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_601fc3e5f0dd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_601cf1b3c21fa.pdfIn PDF document text
    • http://buytoday.cc/89966503339740fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_6009fb5a4374a.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/benanibulasozutolodiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_5fd0e54b7e902.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/art_pro_mpa_ii_service_manualm5xag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanuziti.myartsonline.com/revised_common_lectionary.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_0e27e82b971d4efdb6f5a75f99738770.pdf?index=trueIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_5bf44226095b44a780178deb6bfcc78f.pdf?index=trueIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_7cefbaa511db4b79833c3878514081f1.pdf?index=trueIn PDF document text
    • http://pupagerirawax.myartsonline.com/ruzoxebijosunetukoke.pdfIn PDF document text
    • https://a9b7993f-6967-48c1-a2c3-d5bc86fe985f.filesusr.com/ugd/ea2be3_ed34ad2625ae4fcc915525dae86bb8bf.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_f4043dacf83e413092d28a6fbc6b1cb1.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_27c4cc0c0b9d4bcc99da9058f942d141.pdf?index=trueIn PDF document text
    • https://aaca6425-83b8-4992-a49d-2ec8a2d61848.filesusr.com/ugd/304e3c_513fa647c40e46848d35d5e804ad9488.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 5256 bytes
SHA-256: cfc71c0eee0c75d958ef024595eb9631dc89eb75304e07105d7a0cdf889c8bf2
font_01_sfnt_off0001254e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254E 11384 bytes
SHA-256: 5bee99ad3aba14332994defb25cd543ce1067726023c6db40edf1c3737c11ef6

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