Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dcce450217c83c…

MALICIOUS

PDF

68.1 KB Created: 2021-03-15 05:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e3ff85913a6aa48232b5c4454912bea SHA-1: 5abb3799917ab755043c416d068b54a9d2ff3450 SHA-256: e0dcce450217c83c698d9c5313beb915fff73f6f12ea8d00cbe0aed6fcb907aa
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/award?keyword=marvel+encyclopedia+pdf+download PDF link annotation
    • http://abistrans.ru/sennheiser_ew_100_g3_wireless_microphonezt23g.pdfIn PDF document text
    • http://hookup754.fun/physics_formulas_for_neet_2020_download7tkgm.pdfIn PDF document text
    • http://frankiearvelo.com/argumentative_essay_conclusion_templated42wg.pdfIn PDF document text
    • http://shop-kid-toys.online/738476974859q1u8.pdfIn PDF document text
    • http://fastpysystem.online/95530630822jk8os.pdfIn PDF document text
    • http://wutobunuponumed.22web.org/29305423900.pdfIn PDF document text
    • http://terugate.mypressonline.com/exponentially_weighted_moving_average_tableau.pdfIn PDF document text
    • http://changepass.online/viwamejukos8ya2t.pdfIn PDF document text
    • http://tryporte.xyz/872951131203as1f.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/letra_y_acordes_de_yo_sin_tu_amor_alicia_villarreal.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/how_to_use_a_plot_diagram.pdfIn PDF document text
    • http://libifutolile.iblogger.org/wafuvo.pdfIn PDF document text
    • http://brumbum3.xyz/76401500614flitf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vusegax.rf.gd/dirt_devil_pro_express_ud70170_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/android_studio_signed_apk_password_verification_failed.pdfIn PDF document text
    • http://roxegubipav.epizy.com/bcbstx_enrollment_application_change_form.pdfIn PDF document text
    • http://gosefemifav.epizy.com/divinity_2_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/what_kind_of_wire_should_i_use_for_my_house.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_off0000cc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC71 5232 bytes
SHA-256: c746d1ee4ab72db58caf0d8bc637c612e7e097324c56712ec4777c2e7a7d9446
font_01_sfnt_off0000de79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE79 10800 bytes
SHA-256: 3b1a5893480c48b05910c6ccadcc663cc4a2c1d78d9de7110ab049b9a843b9a5