Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf117b26a6caf2e…

MALICIOUS

PDF

82.6 KB Created: 2021-03-14 07:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3a8ae43fffdd92a23daecd6dab1981e7 SHA-1: be84ea1e80114ca803ee344fd0507e5784c8f0e3 SHA-256: 6cf117b26a6caf2e2d5b604f690d0780ea29345824aafc1c8dc5a12116e48a6e
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to further malicious content or phishing attempts. The presence of external URIs and the classification as a 'link farm on disposable hosting' strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://seumenha.ru/award?keyword=samacheer+maths+book+pdf+class+10 PDF link annotation
    • http://xuzerujagojagip.scienceontheweb.net/what_type_of_government_controlled_the_soviet_union_during_this_time_period.pdfIn PDF document text
    • http://5coupons.info/apply_for_apple_card_on_androidmfxe8.pdfIn PDF document text
    • http://ijmalan.xyz/walter_piston_harmony_book1ne4n.pdfIn PDF document text
    • http://sayfelengs.space/new_england_patriots_injury_report_week_918oox.pdfIn PDF document text
    • http://aires.fun/461122989500ngjm.pdfIn PDF document text
    • http://petrol-v-pol-price.site/2002_buick_rendezvous_service_vehicle_soon_light7blg1.pdfIn PDF document text
    • http://sorulaxawo.iblogger.org/emotional_regulation_worksheets_child.pdfIn PDF document text
    • http://alex-chekalev.com/what_are_the_objectives_of_psychologyqt51a.pdfIn PDF document text
    • http://muldwych.com/ixl_learningsearch_topics_and_skills_username_password_remember3klp3.pdfIn PDF document text
    • http://helplnstagram-confirm.com/optiplex_gx280_release_dateh1q9u.pdfIn PDF document text
    • http://hisgohar.site/27418276206aisya.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/mupexibanefuxexunu.pdfIn PDF document text
    • http://musofiron.ru/hilti_anchor_bolt_gradeo3nl0.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/zajetegavofilodela.pdfIn PDF document text
    • http://bcipreactivaperu.com/boropiwudamasowemavadiw8cqh0.pdfIn PDF document text
    • http://natfreshik.fun/gizmos_student_exploration_water_cycle_answer_keys3swq.pdfIn PDF document text
    • http://instapodarok365.site/86744390619izc5d.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
    • https://uploads.strikinglycdn.com/files/38b60d42-898b-43df-ad72-c2032c66f176/mamibinubazelixime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1b8102-2547-4fd1-8bd4-8186489ba10f/object_oriented_analysis_and_design_lab_manual.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/is_there_going_to_be_a_season_2_of_the_ancient_magus_bride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa569159-e8c2-4282-a08e-28df684ff768/how_to_put_a_keynote_into_imovie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86d12f7-bae9-4a7b-b2dc-822ffd4c0737/ley_de_ohm_ejercicios_resueltos_circuitos_mixtos.pdfIn PDF document text
    • http://vulomalizekuvu.rf.gd/how_to_start_an_ebook_library.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF230 5896 bytes
SHA-256: b185541541dfef8e5d3e094c3ad187dd9bd1d1b5a2d961d50c835a7f9ca9e806
font_01_sfnt_off00010617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 5044 bytes
SHA-256: 408d2c2332bec514becc498cae1f39079128a679b0bf28e417dcda27c5cc7920
font_02_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 11244 bytes
SHA-256: cab025eb5e2632bdc7978c66926a975259d17612544f895523ea766f4d5a429b