Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71444b01c6c85c5…

MALICIOUS

PDF

84.6 KB Created: 2021-05-24 08:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: aae806d851fd90ff1d6d617062454981 SHA-1: 3c6f191c37a33f892bf08b2f5de29e247bea3678 SHA-256: b71444b01c6c85c506d50c2b67d8e0926e508ab8b99389126842bb057e5d1f7d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to 'kuzutuzo.ru', which is flagged as suspicious and associated with phishing. The document body, though heavily obfuscated, contains text related to a 'Kia Sorento service manual', suggesting a lure to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=kia+sorento+service+manual+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/gekokusepilibitigitobure.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/81719205808.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/20704396022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cbd261-b921-412f-b6ec-b6dedc9187c1/abbyy_finereader_14_serial_number_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/comedy_videos_free_3gp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7960f87-f306-4ad8-8fb5-629de5e78d1e/94905408007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4ad828-1cf8-4400-8355-11de6649e18e/tom_sawyer_island_tokyo_disneyland.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/vidmate_app_for_computer_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fc584f-3f3d-4d24-b7c2-2211cd878e25/computer_hardware_devices_images.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/zabixupiwapabusobagajaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/47072423699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173014ef-88be-4dfd-9ea8-2d9a9f207915/como_ter_diamantes_no_free_fire_de_graa_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba0dec7-4cdb-4956-9f98-1063fde80f56/divine_mercy_catholic_church_north_courtenay_parkway_merritt_island_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bd6154-3655-436c-abc9-f0964e4bf189/roxogenexigubopulosilupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d6521e-3914-4fc6-8751-88901c608739/sabira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad15c68a-61a4-40ab-9c80-673f5a70885b/do_chevy_equinox_have_engine_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c966f5-58dd-4b1c-aeb3-b93443b68ee9/the_complete_book_of_hymns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ee09bf-0f6f-44bd-b475-c52a082b854e/what_is_freuds_theory_of_dreams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242bd7b5-09c4-4351-8123-b5847823a34b/48206364155.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/6611741022.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/bakers_cyst_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cf2b1e-52ac-4910-aa94-e0f21bac8652/43250083102.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_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 5332 bytes
SHA-256: e6a2048e9402618c94065e35ee0f0e165957aacb5d71771fdd6929efa8ed1a58
font_01_sfnt_off00011c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C04 11396 bytes
SHA-256: 8c64bd65835d4eacb0b18e9669ab5e06ed72c9a09913b15d3b2c1d15f86c2b86

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