Malicious PDF — malware analysis report

Static analysis result for SHA-256 264ba775471f7136…

MALICIOUS

PDF

81.7 KB Created: 2021-03-12 11:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e80134e4eebb8678832b46691f041308 SHA-1: 871bc04689f4702001cf12513f12b272b83ff351 SHA-256: 264ba775471f713643bab78c19ba144ed367184a53332f8820b0f55b4474d572
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/123?utm_term=addicted+song+enrique PDF link annotation
    • http://strahauto.website/modavujky5ck.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/hg7ShjF/dujareditefizakaduk.pdfIn PDF document text
    • http://svoytrylend.xyz/how_much_do_center_pivot_irrigation_systems_costjpax5.pdfIn PDF document text
    • http://mklhhhh.space/what_was_the_impact_of_us_involvement_in_latin_america_in_the_early_1900sv7q5t.pdfIn PDF document text
    • http://fit-italy.space/lagu_cover_boyce_avenue_perfectbjxrl.pdfIn PDF document text
    • http://medgaj.com/80563014732n3y8s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417814/normal_602cf60b9ab2c.pdfIn PDF document text
    • http://wirelessinfo.ru/jimamotosotugapaxescb33.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/jb0igja/81612273488.pdfIn PDF document text
    • http://womenita.fun/21_day_sugar_detox_for_beginnersxn69f.pdfIn PDF document text
    • http://indital.fun/what_is_reys_bloodline6gybr.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/y7M43gj/funny_riddle_quiz_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6030340142c80.pdfIn PDF document text
    • http://auth02mobility.com/officejet_5740_e-all-in-one_printer_inkh74xa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_6047e10a4577c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_600041f2b378f.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/XhjFl5q/wazuziwerepowok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_600e25cb1548a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_78f3e0398f354797b7e0d3f48d643b8a.pdf?index=trueIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_ec0d76d68b444a259cd2d8f9e6e4ae1d.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_3c5d1f329d3342949e3247a13797517e.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_a72ecfb5d405424489261b8cf5260feb.pdf?index=trueIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_7c229028af784d7990af2243efd4e86d.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_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 4980 bytes
SHA-256: 0008b1782b978629d10091c12919a82d53ba2a1bda3bc287f218919d3d18822d
font_01_sfnt_off000111f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 11628 bytes
SHA-256: e1edd61e7b25808309e2689aef867e8c4100d550f734ac2e47a286ba0be2f6dd

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