Malicious PDF — malware analysis report

Static analysis result for SHA-256 945fa584fe5a2218…

MALICIOUS

PDF

68.5 KB Created: 2021-03-25 09:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2c4fd019b0ba8ac309d4f678b89f519d SHA-1: c998f86482303ba23ac64b5e1a569ed0fc55171a SHA-256: 945fa584fe5a2218d821a5052675e5e6b9dd42bb6b49efcba535619007494024
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one identified as malicious and hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or directing users to malware. Although no scripts were extracted, the presence of external links and the nature of the heuristics suggest an attempt to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=savage+worlds+skill+specialization PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454171/normal_6037fee56b982.pdfIn PDF document text
    • http://arevakar-travel.com/no_sound_from_bose_sounddockytnpn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421209/normal_5fce6dbbeb720.pdfIn PDF document text
    • http://nonretloli.site/kijorutumasekewobimoruhxgcp.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/40168922242bf53k.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/11105277670vf41j.pdfIn PDF document text
    • http://chistohome.moscow/how_to_set_up_seiki_remote6an15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/54350108-f01f-4965-aaed-9bb3496cda23/scrum_the_art_of_doing_twice_the_work_in_half_the_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57de9c0-db4a-4ac8-9bc1-a4ff2664c287/why_is_my_gas_oven_not_staying_lit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0f8086-09b0-4a70-b56e-89ad23d5ba1d/fisher_price_2_in_1_deluxe_cradle_n_swing_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ac2e6e-5388-49ff-ba8b-2ef9a85b9fb4/toastmaster_table_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f203732-0792-4b9a-8de7-a60555de1e08/donde_estudiar_programacion_neurolinguistica_en_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2794b5-bf3e-48bb-9ebb-446eafd23334/michael_pollan_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82ca08f-75bc-420e-815f-61c2c952394f/defiant_180-degree_motion_outdoor_security_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff36998-3d67-4394-8937-30dfdbc3b4db/why_is_smoke_detector_still_chirping_after_battery_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374226a4-0559-475a-8014-9de629e58633/brother_kh_260_knitting_machine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50258db-e315-4dda-ab5c-704c90682b92/construction_toolbox_talk_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e0486c-bb61-46d0-9254-f0f5a2b01fde/champion_generator_46595_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a661bb2-19d8-4c42-9036-97b408efb321/if_pangea_still_existed_where_is_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cba4481-d8bd-4a37-be30-5216e0c28d90/45182466321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f578f17-03e7-4eac-baca-9c0fe40b3e0d/wajemagetuxi.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_off0000cf60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF60 5612 bytes
SHA-256: 3c2f066d67a29d14ed047d5a5f62b9fee1fdaa26f6f6912c8718e1165fce5806
font_01_sfnt_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 9840 bytes
SHA-256: 151a4036af34be73d3ab5cb00d8edcb189e5bdf8bcb57d340b3700c35679663c