Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea4e9c65c69f2c7…

MALICIOUS

PDF

85.5 KB Created: 2021-03-27 23:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4ee6427e52d40001045d6d2d571bac9d SHA-1: 9996c5b0c3c6085f335320c2730abc5bcf4557cb SHA-256: 2ea4e9c65c69f2c7e07d08ba2d27940c1e0a688b97363336650dace1ead0e529
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with attempts to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bandook+chalegi+song++bestwap PDF link annotation
    • http://nafanesowijim.iblogger.org/30909885470.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/logos_rhema_diamant_kalonji.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/ibzogg3/silent_partner_agreement_template_south_africa.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/john_deere_commercial_mowers_for_sale_used.pdfIn PDF document text
    • https://cdn.sqhk.co/tajalawad/jaijSgf/28735142734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_603c64ddb619d.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/hiijjie/64670257956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_601848581a210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445733/normal_5fca226a6d04a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_601f0c88a2884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5fd80be666a90.pdfIn PDF document text
    • http://perorumateji.22web.org/gas_heater_wont_turn_on.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://polilofu.onlinewebshop.net/adventures_of_huckleberry_finn_summary.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/tobovuwibifekitolulone.pdfIn PDF document text
    • http://mavowidigusuj.rf.gd/bank_po_books_download.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_420c8238cd564b658442d655877e2531.pdf?index=trueIn PDF document text
    • https://c3e780e1-a1ee-422e-80b3-2bf79490ff1e.filesusr.com/ugd/dc7b26_d04aa71e2fe743d8b123770c3b26ae66.pdf?index=trueIn PDF document text
    • http://zesosugukazake.epizy.com/11211963992.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_284118a7052740d6bebcc7ff5e712e46.pdf?index=trueIn PDF document text
    • http://notaruk.rf.gd/fetusodu.pdfIn PDF document text
    • http://wadarudi.epizy.com/beginners_guide_to_portrait_photography.pdfIn PDF document text
    • http://gipipirerogarul.rf.gd/chakkwein_suit_ringtone_free.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 5584 bytes
SHA-256: 03c77690b548477b8d04695914dcb36380e2e93f8c61dc90bce44733915c90a1
font_01_sfnt_off0000f230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF230 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 11024 bytes
SHA-256: dbec810482699ff8be9c9da2e5e41ebd9a2c3bd09ed57bd2e111e57273a82425
font_03_sfnt_off00012379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12379 16204 bytes
SHA-256: 0318b400cbd4eb80818b7eb131bcca2e18f343f850c5eb1573e525fea31f4d56
font_04_sfnt_off00013903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13903 3704 bytes
SHA-256: ea0d59b746bcdbbae4893482d63e8da1f633a6214c94107b6c68519919b380b8

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