Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76093c8d14a44b5…

MALICIOUS

PDF

81.0 KB Created: 2021-03-15 15:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c0b51fd600d9b8ca4625983c2a80a59e SHA-1: b2f0e35cf51b2e7d292b69a12b36ac0d80bc46cf SHA-256: b76093c8d14a44b5675ec4df63b02881767200f7345ba9ed899d317f8cb656ee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs that redirect to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The primary URL, 'https://soxebez.ru/wix?keyword=fallout+new+vegas+dead+money+achievement+guide', is presented as a lure to entice users to click through. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure and URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://soxebez.ru/wix?keyword=fallout+new+vegas+dead+money+achievement+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389384/normal_601d2fb026d02.pdfIn PDF document text
    • http://floradoma.net/how_to_use_an_electric_char_broil_smokersms78.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/pance_prep_pearls_2nd_edition_ebook.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/cardiologia_peditrica.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475847/normal_5ffcb038d9398.pdfIn PDF document text
    • http://najelipopusivut.getenjoyment.net/nios_assignment_cover_page.pdfIn PDF document text
    • http://hesap-al-sat.com/vasanud3rjd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_600a01e1532e4.pdfIn PDF document text
    • http://timecodes.net/glencoe_geometry_chapter_4_test_answer_key34gs7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_603f97941c215.pdfIn PDF document text
    • http://hallop.xyz/341526682332fheq.pdfIn PDF document text
    • http://pr-bux.online/zuvorilizrebhy.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/94344822652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_604e926397236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_8f2e22ab883741349a47c104ae040331.pdf?index=trueIn PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_eaca4cb2606447b6a9caad96e233d459.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/wufesesulupi.pdfIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_b795b59492a74fa48d3296d599af826c.pdf?index=trueIn PDF document text
    • http://tirisesu.onlinewebshop.net/how_to_implement_agile_methodology_in_testing.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_32e088e164c644db900ea3f777067f11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bivanud/bujirexepiwunisivinojisos.pdfIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_239e82e672a4405c960316c10bbc63bc.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_1fe925a43c7a4128a181f9cdbf5de79a.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB31 5348 bytes
SHA-256: 7752866477763fd9ce8e5e0fcc568a6b05d1ba2787f2dccda13e275a27d2a604
font_01_sfnt_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 10828 bytes
SHA-256: ea1dbc285f9005c066378b6ae9b2757d65b80edf41d423d462f0499610c9b492
font_02_sfnt_off0001123b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 16356 bytes
SHA-256: fd263965a09bc1badac07735c7d799937a2a66683b306b25b9aaea483602b021
font_03_sfnt_off000127b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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