Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e72494538838f1b…

MALICIOUS

PDF

80.9 KB Created: 2021-03-15 01:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c9e28a20dbd68124b64dc9f878dffa9c SHA-1: 20f8a3b27f4252b5741332b2bbaf134a1ea3be05 SHA-256: 9e72494538838f1b38134e5aa1d1000dc93e62afea045b45528c99ec105093df
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/123?utm_term=class+8+civics+chapter+3+answers PDF link annotation
    • http://mowefopovog.mywebcommunity.org/relation_between_electricity_and_magnetism_called.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/47984388753.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/nhedY13/34610170215.pdfIn PDF document text
    • http://duwisodoginut.22web.org/mulwala_water_ski_club_gig_guide.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/a3_problem_solving_book.pdfIn PDF document text
    • http://zufuruz.22web.org/iso_27001_compliance_policy_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/WGhb4dB/nikah_islamic_wedding_ceremony.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
    • http://patuwovoparivi.rf.gd/running_back_workout_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a58690-a8e6-4a96-bb6e-3556b72b327d/game_of_thrones_recap_season_3_episode_2.pdfIn PDF document text
    • http://tidosanivowevez.epizy.com/c_h_spurgeon_books.pdfIn PDF document text
    • http://vegijobis.rf.gd/website_mockup_template_powerpoint.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/fototurirafuvajudezove.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/27588870361.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/cabinet_ministers_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325def29-265d-4954-9b0c-eea676c697c5/the_hunger_games_catching_fire_free_online_123movies.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/suxadifijetegobifika.pdfIn PDF document text
    • http://tajujuzedil.epizy.com/47804615733.pdfIn PDF document text
    • http://lonesopuw.onlinewebshop.net/business_partnership_agreement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68018a43-0cea-4f3f-863b-ef1d81745301/distintos_nombres_de_dios_y_sus_significados.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/dasidapodefonop.pdfIn PDF document text
    • http://punegejofuj.epizy.com/semovujanawizeviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c8826e-ee39-4065-b850-cf059bf830a2/what_cameras_are_compatible_with_lorex_dvr.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_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 5436 bytes
SHA-256: 38aad96fcfceb7069419123dc54c5b4ddcea04d785fd25ef97c9e0d78168699b
font_01_sfnt_off00010290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10290 10428 bytes
SHA-256: e73aed0e7e253be509f79218dd86a2924fdd15e087c96adc082248f82dcbbd7a
font_02_sfnt_off00012662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 4104 bytes
SHA-256: d86841448d156dec0ab2ef9e32ebc52c98ce6bd66952df644b03232ba5d6c03b

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