Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55954368d614d8c…

MALICIOUS

PDF

85.1 KB Created: 2021-03-16 08:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d420acd6e148013b6149181aa87fa551 SHA-1: 20614b06a109620dc41e1228c182336a71c05002 SHA-256: a55954368d614d8cf843c274dd09a6c5f049f0b47e756a4b8a2895583ef15e4c
116 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high-risk score. It contains an external URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The presence of PRC/3D content and duplicate object bodies are also noted, though their direct impact on the attack pattern is less clear than the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://jumiwimov.ru/strik?utm_term=2013+dodge+charger+rt+fog+light+bulb PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368228/normal_5fe48c4d6f3ac.pdfIn PDF document text
    • http://suzaxikuzexaw.66ghz.com/44096124537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450145/normal_602ec39806d76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_6027699860154.pdfIn PDF document text
    • http://vafakewa.iblogger.org/body_parts_vocabulary_worksheet.pdfIn PDF document text
    • http://makipoduzoru.22web.org/92778324224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_60207da0a610a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4dae8da6-4456-4872-b896-08486925c4ed/will_to_power_friedrich_nietzsche.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/jane_austen_pride_and_prejudice_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/best_free_fitness_tracker_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/chandni_chowk_to_china_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/amazon_kindle_the_monk_who_sold_his_ferrari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9893b3b8-fdd1-4688-99ef-088d697fe7ef/whats_the_starting_pay_at_starbucks.pdfIn PDF document text
    • http://kebinuwozumen.epizy.com/cerebral_venous_thrombosis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/niwifosazimaxopajuj.pdfIn PDF document text
    • http://pasekinewalepu.epizy.com/xewes.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/wendler_531_boring_but_big_spreadsheet.pdfIn PDF document text
    • http://ritanuwo.epizy.com/rixinikumuv.pdfIn PDF document text
    • http://jezosimo.epizy.com/baxojabanatewagako.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/celestial_coordinate_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11e388e-581d-455d-ab92-f7549f241802/fotiti.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/emotional_intelligence_workbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/siteritefowaseku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29750ed4-049d-4a4e-b2ad-a338cb1e9311/historia_de_mexico_prehispanico_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98ad7bc-d52c-4467-9e17-34b5e195e19e/zigedezovo.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/attire_definition_formal.pdfIn PDF document text
    • http://sedepijenokarol.epizy.com/satumakevimulanupeganotas.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/breakfast_at_tiffany_s_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 5416 bytes
SHA-256: faaece29a04b2fafbf77879632d651412da8510748fa9cf23a564b02e4d5817a
font_01_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 10928 bytes
SHA-256: 75c26948dc7b23d88a2247e70c33ecad336ac5a7158af90ae58749378671c42e
font_02_sfnt_off00013842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13842 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e