Malicious PDF — malware analysis report

Static analysis result for SHA-256 5649e6a24b9e9b37…

MALICIOUS

PDF

76.4 KB Created: 2021-03-07 02:29:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0dea4ae55c3c2eb71c0752e3b5595c9d SHA-1: 3995fc51e3a43f9eff510d565ce4db408c17a6aa SHA-256: 5649e6a24b9e9b37ae88776ac57b66f97dda8d9e2f52178f22a68e1b14793e1e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'study guide', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://xajibur.ru/wix?keyword=disciplines+of+a+godly+man+study+guide PDF link annotation
    • https://cdn.sqhk.co/guxudakakali/DgcjcFj/swordsman_marvel_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/iiffwif/race_for_the_galaxy_app_review.pdfIn PDF document text
    • http://felezebelitex.iblogger.org/30786102469.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gegdAoM/weather_near_me_radar_map.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/piano_sheet_famous_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/gdjjqgj/quick_school_parent_app_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/I7hj0hj/95475165370.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/SqCguhe/ropafiwobovenibamidabo.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/2HHligU/vocopro_wireless_microphone_system_digital_conf16.pdfIn PDF document text
    • http://detobusukited.iblogger.org/tajuba.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/1ghhgN3/duruge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefekug.rf.gd/retired_teachers_of_ontario_health_insurance_forms.pdfIn PDF document text
    • http://patuwovoparivi.rf.gd/interview_questions_for_students_during_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb9296a-8485-4f27-9c17-c46255f7a50c/what_does_blue_falcon_mean_in_german.pdfIn PDF document text
    • http://lofuwokapowudug.rf.gd/counter_strike_size.pdfIn PDF document text
    • http://xuwomotibinifen.rf.gd/rijef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe51529-3eb2-481d-b787-219d11a40161/99706903638.pdfIn PDF document text
    • http://kazoverowagodi.epizy.com/71783346926.pdfIn PDF document text
    • http://jegubidetexo.epizy.com/acolyte_training_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378b9583-8ea0-429e-940a-88f5648f342f/63493531962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c10657-b3f2-4eba-ae38-6fb89671cc52/manual_de_calidad_de_bimbo.pdfIn PDF document text
    • http://gusegata.epizy.com/lg_d415_stuck_on_t_mobile_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935de76c-2e65-4e0f-9700-cf74b5856953/50077860706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ce2c25-e54b-40af-a11f-03938c9aec35/introduction_to_management_science_13th_edition_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9722de-69e7-45c5-a42c-27de8e24bcd3/wajoketilope.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_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 5480 bytes
SHA-256: 9c5a395ba689c70a6e2717a20d94c7ac1f2a152bc7ef11e5b7d08247b42d5885
font_01_sfnt_off0000fe81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE81 10916 bytes
SHA-256: 143240c1242fe11fd2697b950ceaedcdfd6640f8911cce394e193744b6ef6b8c