Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a23eb64d124dcbd…

MALICIOUS

PDF

76.0 KB Created: 2021-03-18 03:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1ca0a55bcf9b3168aa49f603dd317c65 SHA-1: a86b58b916e5d2ac01a701c78c34f1aa0aaf81d8 SHA-256: 0a23eb64d124dcbdd8f8d8ac8ac2e20b63c84354d5d8fa3280d92f4555b233f4
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/123?utm_term=information+memorandum+template+australia PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/ge16bjg/megan_fox_transformers_audition.pdfIn PDF document text
    • http://raffle.website/65089657196dv6pp.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/hhbKzhi/48613778660.pdfIn PDF document text
    • https://cdn.sqhk.co/likamigid/nid1Zhb/43797076724.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/ySLYhiL/studio_code_frozen_answers.pdfIn PDF document text
    • http://animoney.xyz/datesakuzat0amd8.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/first_strike_roscoe_paintball_revolver_cal._50fqqrj.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/cjdeS5m/nanunajowudu.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/4fdb9ee3-0331-47e4-a74a-fa53237e6897/94399592631.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/bevovefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f16ec3d-d2f2-496e-ae32-49e6ab403785/bogozu.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_0e26f484c4e14461b5d77adf7f1bca4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cc3dad-59ff-4340-b400-48276ad5cab2/51092504449.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/msw_watergate_bay_surf_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911f03d5-2ef9-40e2-ad33-a9b994d2fafd/is_it_safe_to_walk_at_night_in_amsterdam.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_f03ce24e11cf410eb0e2c9b38a2e278e.pdf?index=trueIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_9125ff6d3d6146e892e33e036d7c4a61.pdf?index=trueIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_1228cda2d4bc4f14b45e63af4514443e.pdf?index=trueIn PDF document text
    • https://229013d5-0e14-4531-be8c-43df84542e77.filesusr.com/ugd/e4a895_728b6447454a4d3a9416d45232e686a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef893da-9bdc-4ac6-91f4-e7bbd84d323a/wusuwuvumomudejowokeze.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_0540ab114e154cf7abd8b394d5cf7bde.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_a7ef73837ec54a8e86886fa01e0e67c8.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_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 5124 bytes
SHA-256: 589ccf6a60729fea79a09fdf419d34847e8362fdf0f87e1ed0bce745b6c4261e
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 11332 bytes
SHA-256: 963c0a534c55047886c442dd97553d4a5c7147253f67ac3b0d60eb9333f7e71f

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