Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab7bdc134290414…

MALICIOUS

PDF

93.2 KB Created: 2021-03-11 14:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e56dc79947c97b25ca871e339595b0d SHA-1: 2c4e7a9534a819c31ac5b138496d66b9f962288d SHA-256: 8ab7bdc1342904145df24c28d65761a1ff13e7c164e73e60259a4a69c9ec987a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=la+divina+commedia+italiano+moderno+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375698/normal_603d19207522c.pdfIn PDF document text
    • http://everydays.space/why_denon_receiver_turns_off_by_itselfbh319.pdfIn PDF document text
    • http://joblanc.xyz/driver_sound_windows_10xut3n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390374/normal_5ffe7278e916e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_6022c41350596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_6041e0e65b6d1.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/what_does_the_number_802_mean_in_numerology0pqa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kabisebax/bejawada_1080p_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/dapiwosamebog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807e3aac-6bba-4e4a-a0f8-d27113bc25d2/how_to_find_compound_interest_rate_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/android_file_transfer_alternative_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b3cd57-cc0e-449b-81ba-58d1209b91a5/gegatazimufofofisizen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a59fe13-96e7-44f4-ac81-6a9db6780664/dnd_5e_animal_companion_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988dfae9-1511-4f46-8238-d8493ce43245/biselon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8daa234a-50bf-4256-b8f6-fbc67b7235ee/molar_mass_problems_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2d3637-4d27-40de-bab8-567d0eeab3a0/14040779101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cf3dd2-263e-4e1d-b31b-fd10c544ee84/dimebopowajirujojuwodeso.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/journalism_reporter_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2105990f-1e41-4285-8283-3192cd16c56d/sawanarugizedegix.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/broadcasting_software_free.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_off00012bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB8 5124 bytes
SHA-256: 810fe227a1827a5a06c28302a15205b36766132b09ec30c063f895b2b05bccaa
font_01_sfnt_off00013d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1A 13620 bytes
SHA-256: be4bf8048757c83c947433da443da8130f8bdb8ef7bec6a22a677c290a1bee22

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