Malicious PDF — malware analysis report

Static analysis result for SHA-256 793a41ced5a69ab2…

MALICIOUS

PDF

83.9 KB Created: 2021-03-21 05:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f4f802668c59440c20973d6c532cfa08 SHA-1: 5e313c03d853ce626766dda1339f8ee3edf0c412 SHA-256: 793a41ced5a69ab2293733e9188ec78af627efdcfa0d17c1e274b1762d3ddc42
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/wix?keyword=justin+bieber+yahoo+answers PDF link annotation
    • http://glawerry.online/69393672847dzdhs.pdfIn PDF document text
    • http://2gusevshop.space/towixunibudaby67lp.pdfIn PDF document text
    • http://basiditdcf.space/ward_newsletter_bishopric_messagedf1fs.pdfIn PDF document text
    • http://elinekici.online/angularjs_7_bookaw3m7.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/6LiXKTW/61787493488.pdfIn PDF document text
    • http://fakojel.22web.org/arduino_uno_ultrasonic_sensor_project.pdfIn PDF document text
    • http://energierecrute-emplois.com/danby_dehumidifier_ddr040bfcwdb_reviewsr9gm4.pdfIn PDF document text
    • http://pr-bux.online/73698122403d10ac.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/N3NBXhb/bebavufojuwerikubevotego.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/ngcsQsC/ygopro_odd_eyes_raging_dragon_deck.pdfIn PDF document text
    • http://wegansit.space/types_of_psychological_evaluation_tests94hi6.pdfIn PDF document text
    • http://com-copyrighit.com/261694004491k0xm.pdfIn PDF document text
    • http://getsol.xyz/773586859299wnsf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifavudufolafu.epizy.com/kerbal_space_program_free_alternative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ee9579-943d-4002-b2e5-48ca25cb433b/52474003640.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/direct_and_indirect_utility_function.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/lowrance_hds_5x_fishfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b98743-83fd-4d09-97e3-1b66a47ac09a/how_do_i_fix_my_hp_printer_missing_or_failed_printhead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f15c41b-8d3d-4ef8-a5f8-ba8607c14941/power_of_information_technology_enabled_services.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/html_css_magazine_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/excel_high_school_online_answers.pdfIn PDF document text
    • http://tugujaxozulir.rf.gd/gebibe.pdfIn PDF document text
    • http://dogefifuga.rf.gd/aerostar_600_performance_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/pimezowugaloxisijezoz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5064 bytes
SHA-256: db748f8b9db0ed507c3e4c8725f343e80a2d7d367c6d030f00db1ebac5c1d913
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 11804 bytes
SHA-256: 35f18fc34ab58f6eb27556146214ce07e3d5435a448f59349bfedf3bea2a115e
font_02_sfnt_off00012b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3F 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15