Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffa1adb9e9dbf31…

MALICIOUS

PDF

80.6 KB Created: 2021-05-10 10:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d4f4a6c2ea9b4843ac7e7f55f3cec8b4 SHA-1: e3c097662ac7e8b8b8dccbb5c83080891f36c7b7 SHA-256: 3ffa1adb9e9dbf318b6edc3c5d1a784332d0f335c247eaba133d777ad52f059d
146 Risk Score

Malware Insights

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

The PDF document uses a cloud service lure to trick the user into clicking an external link. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://nipisod.ru/strik?utm_term=my+cloud+home+ios+files+app PDF link annotation
    • http://kiwedoro.66ghz.com/mojorinakuni.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/red_hat_linux_administration_interview_questions_and_answers.pdfIn PDF document text
    • http://ketosimple.online/biblia_de_estudio_explicada_concordanciam61uf.pdfIn PDF document text
    • http://biomanua.website/how_do_you_make_iceberg_slime_recipeiw70s.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/heppjgM/spider_solitaire_game_download_for_pc_windows_7.pdfIn PDF document text
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/cdabfed6053c1b.pdfIn PDF document text
    • http://reduslim-officialsite.site/the_king_of_fighters_97_onlineekgzk.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/fexexizvh59n.pdfIn PDF document text
    • http://kavanepamor.iblogger.org/honesdale_pa_police_reports.pdfIn PDF document text
    • http://all-system7.xyz/540271933720t3ty.pdfIn PDF document text
    • https://gesovomovo.weebly.com/uploads/1/3/4/7/134716395/vudokotolim-dusiwove-dafokuzudugus.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/16114274764.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/lanujaja_wibigo_mifudel.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/gcahxgd/nabidamenofuziwetekasa.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/8PolCdS/33371076757.pdfIn PDF document text
    • https://ramowofotaro.weebly.com/uploads/1/3/1/6/131607053/xugogaxago.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/8a99917ad3fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/5712318001.pdfIn PDF document text
    • http://zugejono.epizy.com/bodas_de_sangre_character_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/que_es_la_etica_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/evan_almighty_full_movie_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/answers_to_big_ideas_math_advanced_1.pdfIn PDF document text
    • http://lavisekenesavof.myartsonline.com/modern_auditing_and_assurance_services_6th_edition_solutions_manual.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_off0000fcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 5408 bytes
SHA-256: cd4da4d08728f66e2b018777754ea542bf1cae5b4db9397311441085be715bef
font_01_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 11244 bytes
SHA-256: 66fd6788f8544eb9a85e2830576b7ce2c36e184b2ae4a03e53b88f088b3286c5

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