Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04cebbb59feebe1…

MALICIOUS

PDF

96.1 KB Created: 2021-03-12 04:27:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 220b26150317bcd9050ba84d87812554 SHA-1: dcd003a9821b78214aff9b5d12d5aff4bc5fe138 SHA-256: f04cebbb59feebe1876ad7b61183cb8ead67dca4ead066617cbbdd35403d0f87
184 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'breaking into wall street interview guide pdf', aiming to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=breaking+into+wall+street+interview+guide+pdf In PDF document text
    • http://pebebusunirozad.iblogger.org/the_one_thing_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_60113c5f1c987.pdfIn PDF document text
    • http://hytri.com/krups_12_cup_glass_carafe_replacementlfdui.pdfIn PDF document text
    • http://mp4.design/what_is_my_dpd_parcel2x5m6.pdfIn PDF document text
    • http://tututot.mygamesonline.org/4203316527.pdfIn PDF document text
    • http://profaudit32.ru/224078377346js2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501198/normal_5feb1e972e5cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_602212795ca8f.pdfIn PDF document text
    • http://lirelejavebot.iblogger.org/mariage_d_amour_guitar_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_603eb774b7e45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_60046a40349eb.pdfIn PDF document text
    • http://bluetea.space/peer_assessment_in_education_slidesharezamg7.pdfIn PDF document text
    • http://gtomishebs.xyz/33324708462uvkqt.pdfIn PDF document text
    • http://lapuxuzogu.22web.org/corning_cell_counter_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepulufe.epizy.com/fundamentals_of_physics_jearl_walker_solutions.pdfIn PDF document text
    • http://voferumupisefag.rf.gd/facebook_messenger_mp4.pdfIn PDF document text
    • http://kimitumepogamom.epizy.com/lord_durham_report_1839.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/ride_the_tiger_song_dio.pdfIn PDF document text
    • http://najiniroxow.rf.gd/25114387030.pdfIn PDF document text
    • http://lunuganuxik.epizy.com/pioneer_avh-x4700bs_mirrorlink.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/7083251582.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/chota_bheem_cricket_games_free.pdfIn PDF document text
    • http://xelujoweda.rf.gd/xetuvepapugibawem.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/whirlybird_helicopter_template.pdfIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/dictionnaire_d_orthophonie.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/angular_form_reset_one_field.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_off00013ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB3 5472 bytes
SHA-256: 593d4b5a7959960cc754a346d23c33929db6145580bd6eb8ad48cfa6c52eb6e7
font_01_sfnt_off00014d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D85 10892 bytes
SHA-256: 051bdcf24d54dcf03170a44ac08c72930ee1d751a29716a904e5044f1e990f5f