Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbead5d4e6021fae…

MALICIOUS

PDF

88.3 KB Created: 2021-03-30 12:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8dfeffb50fa55e2887e4885e2128e409 SHA-1: 5cb94e882451a503c0ea51517181058d72347f17 SHA-256: cbead5d4e6021fae2fedfeb04dffe0e68b328cdf61845cf3917094d96e8330a4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://nipisod.ru/wix?keyword=is+the+virtual+boy+region+locked', is particularly suspicious and likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=is+the+virtual+boy+region+locked PDF link annotation
    • http://xugerovogubex.22web.org/fatit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_baf22e1788da4634ad224c33ed58bd1b.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_c87ad3c292d94101ab125bd3088cedb7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/348cb34f-e6ab-4a79-8360-f7259d3c3b39/what_benefits_do_disney_world_employees_get.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_975bfb5974e549df8efd97c299bea495.pdf?index=trueIn PDF document text
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_af5832131ba34f9395289ea70cc21b5b.pdf?index=trueIn PDF document text
    • http://fopadunopim.epizy.com/breezer_vivid_shuffle_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08996b22-e630-47ea-8ba8-90ebd4aeb0cd/what_are_the_indicators_of_sustainable_development_goals.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_a0bb957d1c5f421788bed5fd8edf1ad8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4551954-0348-4cbc-9ceb-8d78fb091839/how_to_use_a_craftsman_staple_gun.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_0e1a0da268014f7e9bab8c082ed143be.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_b98e177254de4b15a482dbad02643dff.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_3986354f99b64c5e8929c65593fe786b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81973bf4-0883-4ad6-8761-46bb004468ef/31883564338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e075621-6480-40dc-9c25-81d0cf571c4a/32718591889.pdfIn PDF document text
    • http://zezajezo.epizy.com/adhesive_vinyl_sheets_cheap.pdfIn PDF document text
    • http://tinanatibora.rf.gd/does_a_vaporizer_help_with_emphysema.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_a93cceaaef8246dca5d810e8cdd82e9d.pdf?index=trueIn PDF document text
    • https://19a4122d-28db-4ec2-a9e3-8c1e87f24dd5.filesusr.com/ugd/70d0b7_5b6cb3ef2324463b81e8f7825d5386d3.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_0ade6ef81f5246bab807110773d388ae.pdf?index=trueIn PDF document text
    • http://konapawejiwevin.epizy.com/29381906252.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_cd8001e210f34eb7b617c5aece0f7205.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_63e7047ac5b74ee49fdd424c0b9ec6dd.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_3718d851910d4078bda3746389f16bc4.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
    • 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_off000104d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 5504 bytes
SHA-256: 1f7d435ebd454062b4c8b15650cf15c969b7154fc9f84318a0a23a273be6bdb5
font_01_sfnt_off00011792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11792 10580 bytes
SHA-256: 9fb45dfdd0af9709638f599dd49ed427c47a693e3cadd713315511ae188a2e48
font_02_sfnt_off00013b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8B 16400 bytes
SHA-256: 6e572deb3027fb257ffe486febfe121ae94bb530aa7028b50d81a4bdf3d710a4

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