Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b9d480866598eb…

MALICIOUS

PDF

79.8 KB Created: 2021-03-22 21:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3aa14a3f57838af6cc10e094e5cd65e7 SHA-1: bdc5b9839eb66b462106e7ce5b7c911fb0bc3f45 SHA-256: 27b9d480866598eb1228f96bab51baccb5de9acc28a07544c48240187680aba4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF acts as a link farm on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://seumenha.ru/award?keyword=short+adjectives+comparatives+exercises+pdf PDF link annotation
    • http://tufuwavaziga.mygamesonline.org/lezeromavegeribifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fc740106944a.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/28062773097.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/monasufalikazigogudegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_60461d1feedb0.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/LTyifsp/ice_cream._cake_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/eaavEZg/car_racing_events_near_me_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/ejiRhan/head_basketball_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lowixadoges/OgfWig7/play_w_radio_mexico_en_vivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447097/normal_601eb21d6d15d.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/55865771391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_60274c0626a6e.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/ejhgcwa/children_s_woodworking_classes_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_93513331f80e46368ccd971367c39165.pdf?index=trueIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_3fda68f3b5d34c1bad0ed49e44927484.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_fdabffeeed054737b8b81862165be4c2.pdf?index=trueIn PDF document text
    • http://totuxivez.onlinewebshop.net/13487681980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a05048-69d3-4b19-9da2-9e6044e878e7/gevilufekamifiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d8c3df-b533-484d-a76e-c9375ab6b9fd/el_juego_de_la_vida_y_como_jugarlo_resumen_capitulo_7_la_charca.pdfIn PDF document text
    • http://tasodeporojunez.epizy.com/how_to_control_child_anger_management.pdfIn PDF document text
    • https://7c50ec62-1ece-451b-b03c-4788199016cf.filesusr.com/ugd/635f3c_1239a9f3f7284bad8bef2f6cb4819537.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_276bf98fd7b64055bd0623b9791f0705.pdf?index=trueIn PDF document text
    • http://pelubameta.epizy.com/oxford_bookworms_library_starter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f50c3b-53fd-40af-b93e-81a3571c58d5/7733348002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1857fc81-3a09-427e-b128-cdd0adde0a4e/39653232211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd49601-aeb0-4760-8752-0ab47bc0ef03/how_to_use_lg_washing_machine_6.5_kg.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 5672 bytes
SHA-256: 3f503ed50840052f76bacb08b12b6f2acfbd6ea3884842ccb934c61917b4c8aa
font_01_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 11136 bytes
SHA-256: a19cbe4d9d738956b8680d813d2d87c3aebdb691ba395db7d3c8e0c403441e16
font_02_sfnt_off00011b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4E 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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