Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac33fa113bae81e8…

MALICIOUS

PDF

80.4 KB Created: 2021-03-14 04:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 18ec2e65b0d9becc03dac6068f71cdfb SHA-1: a24ffa28979279b082d110d731a5ac0d15fe6777 SHA-256: ac33fa113bae81e88100a63710cea6d7a62446c82ef4a67e8ec06edd4694e37d
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs disguised as search results, aiming to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing and trojan activity. The presence of external URIs suggests the document is designed to redirect users to malicious sites for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=latest+periodic+table+of+elements+2020+pdf PDF link annotation
    • http://fastdonwload.space/possessive_adjective_worksheet_grade_2m3ask.pdfIn PDF document text
    • https://cdn.sqhk.co/wevemugas/diggfgj/73918113039.pdfIn PDF document text
    • http://susojatafumo.22web.org/report_kruskal_wallis_test_apa.pdfIn PDF document text
    • https://cdn.sqhk.co/febalotifako/IidRigO/fukumujefukufaforux.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/UfjbYja/lofaxaxirukupis.pdfIn PDF document text
    • http://stnold.com/telecharger_moto_rider_death_racer3zh2z.pdfIn PDF document text
    • http://bostpolamos.site/4604181801ltr22.pdfIn PDF document text
    • http://jerusitujuj.22web.org/fender_super_champ_x2_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/gfu2cjf/subway_simulator_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/jcKGghL/td_bank_swift_code_queens_ny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8ea5fc-4277-4379-b89d-499329bcddab/skyrim_skyui_favorites_menu_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/fetal_pig_dissection_digestive_system_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/kujemudumorimebufi.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/averta_bold_free.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/xojejadabogepotifunawode.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/bahubali_2_movie_song_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/career_development_goals_for_hr_professionals.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/xinikugidevuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b6fa03-ae43-4a69-9e19-4da7b43d2985/is_rbf_ionic_or_molecular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a1678f-aa02-44a6-8ef7-3a5f538d15b1/kirby_vacuum_repair_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/brighthouse_tv_guide_melbourne_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/18592199600.pdfIn PDF document text
    • http://zupibejozoge.rf.gd/recoleccin_de_datos_ingles.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_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 5656 bytes
SHA-256: bd0934a90491f5bd070405aaf2b85e9958f3fb940b39725f638bb0e3265829cb
font_01_sfnt_off00010d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D90 10916 bytes
SHA-256: 544a3d8a5c5e9b959d209aa09a78fb6c0f84b0356c296dc39ed4013d9a67094e

Open this report in the interactive analyzer, or submit your own file for analysis.