Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dfcf1fdd56f092…

MALICIOUS

PDF

77.7 KB Created: 2021-06-09 04:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e5e9f84e736511b0ba5b22e72dc0750 SHA-1: e78bd946c3d2305cd64d20e052fa0180b276a322 SHA-256: 62dfcf1fdd56f0927738e578d60931e45079e97f9f1573526b0ce98b5cb7320d
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 0.9996

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://irlanc.ru/pbw?utm_term=spider+man+2+game+torrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421207/normal_606376452a8de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479224/normal_5ff80d244d69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_6022299b7e041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_6018d27c955c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b7b8c7-bad5-4e9d-941f-126715338ed6/physics_equations_of_motion_practice_problems.pdfIn PDF document text
    • http://fubajulak.pbworks.com/f/best_3_point_shooters_in_nba_2k20_myteam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c476eb-b764-4596-8fd1-463fdef045f7/bell_hooks_all_about_love_sparknotes.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/f/nulls_brawl_alpha_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf06704-a515-4c32-a928-65f691fe24e5/tilafelojorimozamabesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0327ecd-3a2c-4b99-a6a0-6877f482c256/27745514039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca758cd0-682c-46af-a34a-46e6ad1e35ed/17343820257.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/practice_drawing_3d_shapes_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc05a5e-b6e1-4387-81b4-140325aebf26/getab.pdfIn PDF document text
    • http://favakiwosut.pbworks.com/f/30836611161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15cd2a8-e32a-4bf7-ab33-0c80de490f88/gunamivuxelisimawowol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da270641-4d5c-45e8-9bbf-afe1e9a34ae2/barn_burning_murakami_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32961825-854e-4ffe-b178-9c698e880e6a/pomusaxowixop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3962f19-4753-4aaa-82ba-153f905d122b/vermont_castings_intrepid_1_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee54328-30b1-4e6c-9b05-dc004f2ddff2/miniature_dachshund_cross_puppies_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82fe606-d7d3-4636-b14e-34d555030951/anarchist_cookbook_amazon.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/f/xewajenazej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d091806-07db-40b5-a969-45d48eeac799/what_are_the_elements_of_floral_design.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF307 5304 bytes
SHA-256: f23b1cbf226784a70d5f12841b505c4f60d95ce862bbdb95a18035eb8cfb3b00
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 10776 bytes
SHA-256: ebaabcdae6b9d08c8f429ca5571f63c1634e543db086816f54a3757d383d2ea6

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