Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b64ef048bee8628…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 18:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 12ed05602c4a75d245f94dad2a71cf23 SHA-1: 748b3e8237ae8ece959054d3c55d9da29ca8e6f9 SHA-256: 1b64ef048bee86285ab0b2e7da6ea8523d3f7956c5ffd14721aa17d2347ff0a1
66 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, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://leonvi.ru/wix?keyword=volsmart+android+5.1+manual+download PDF link annotation
    • http://ses-paypal.com/jeepers_creepers_3_download_720pcphco.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/YmYHnie/luzasugisifaf.pdfIn PDF document text
    • http://stakingyfi.com/volarogetukowumiliwovz8bp.pdfIn PDF document text
    • http://vimebadu.22web.org/microsoft_certifications_path_2020.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/89131416273xb4wx.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/agiWhe6/hoplite_phalanx_reenactment.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/iaPtVtZ/big_notorious_music_greatest_hits_album_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vojasipi/ehhjegd/catbird_seat_meaning_in_malay.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/iihB0bY/billiard_city_free_download.pdfIn PDF document text
    • http://namibav.iblogger.org/20066834550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f27bca7f-571c-471d-9e77-92385e6dfcd0.filesusr.com/ugd/9a0fa1_6f4bb866dfc343e388d1db57dcf5fd5c.pdf?index=trueIn PDF document text
    • http://xesuguralorev.rf.gd/probability_theory_and_mathematical_statistics_by_marek_fisz_download.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_98587295448d4c86a0330794dbfad2b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b957ea0-50f0-43cd-bf8e-16216e29288c/162734080.pdfIn PDF document text
    • http://dolufin.epizy.com/dieta_celiaco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdda932c-f086-4705-9561-fff4e7be5f87/what_is_avon_dry_oil_spray_used_for.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/degradacion_de_proteinas_bioquimica.pdfIn PDF document text
    • http://bovamiwojilonem.epizy.com/futijonufoxizosesonurunam.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_162e7a1754aa4b0d97539b781a013d71.pdf?index=trueIn PDF document text
    • http://sikirubuguje.epizy.com/22756915937.pdfIn PDF document text
    • http://potimafekun.epizy.com/do_you_use_punctuation_in_parentheses.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_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 5236 bytes
SHA-256: 81c824a09ce9379489235a5bdcdd7cbc283419cf49b4d63f2a24bd11ae75ba81
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 10856 bytes
SHA-256: b25ff754d39897bc50ee2462022150aef95f60c1c81a5a0fb3f3d0f2adbbf2be

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