Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00de7f2e38c4108…

MALICIOUS

PDF

72.5 KB Created: 2021-03-04 01:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e4b97f107b352d38719f7bfd484cae11 SHA-1: 8d18772aaa9425145cc5d0242eb8c329a8459f58 SHA-256: b00de7f2e38c4108820dcb1255260d54547b8202e0c4ea91cadb4bbbe1d0ee85
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. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a strong likelihood of malicious intent, likely to redirect users to phishing or malware hosting sites. The ML classifier also strongly supports a malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=how+to+patch+ps2+iso PDF link annotation
    • http://subaxidubuju.22web.org/espn_nfl_injury_report_week_12.pdfIn PDF document text
    • http://labiosdewonda.com/single_cycle_multi_cyclet1we3.pdfIn PDF document text
    • http://rigajupuseb.iblogger.org/can_i_do_istikhara_in_periods.pdfIn PDF document text
    • http://itverys.space/bloom_and_lahey_modelalvl5.pdfIn PDF document text
    • http://rawuzexo.iblogger.org/jijivalumamesowufugavafa.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/is_there_a_season_2_of_big_little_lies_on_hbo.pdfIn PDF document text
    • http://harmony-market.ru/tapuzusuzi3a08.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/fovulil.pdfIn PDF document text
    • http://eurofamily.pro/halk_iiri_rnekleri_ve_incelemesizhknb.pdfIn PDF document text
    • http://ketousa.site/repofovefubabudaxanja79m.pdfIn PDF document text
    • http://womenit.space/jitter_click_test_world_recordb5jsf.pdfIn PDF document text
    • http://muliruno.22web.org/6130299254.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/how_to_find_tension_in_a_string_over_a_pulley.pdfIn PDF document text
    • http://itfamily.pro/d_link_dir_615_price_in_bd1vwkx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxuset.rf.gd/how_to_wash_chicco_keyfit_30_car_seat_cover.pdfIn PDF document text
    • http://kidereludabiron.epizy.com/communications_plan_template_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/kaxenuzelupuwilivabuvivor.pdfIn PDF document text
    • http://wivufakumetewiv.rf.gd/porovinujufebomewilepa.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_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 5076 bytes
SHA-256: 8179653cf276fb808855aad1f6ea4f0394a11ad3c72d072581ef93b951ce726d
font_01_sfnt_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 9780 bytes
SHA-256: caa105ec9a8a1b0a0428b05ef38fdc2555520b1eac8b3d4e9e4bed798a23a9da

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