Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62cdc78a100574c…

MALICIOUS

PDF

73.3 KB Created: 2021-05-25 02:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f0a941c2954d14c61affd88727f89113 SHA-1: d4a06dddead3432b1100bfcfef2ea21ae30d1661 SHA-256: d62cdc78a100574c86112dea3c29f7896ef1d21d84d8fa1b704ccd54cd4e7074
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, which is likely the primary vector for delivering a secondary malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'homemade fire extinguisher'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wb?keyword=how%20to%20make%20homemade%20fire%20extinguisher PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445754/normal_600b710b392a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_601ee2c5e93c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_603e4a8964e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_602bf585e7b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5fce8ede07e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_606b3e3bee25b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_60185ecb3950e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5fca4e26d5868.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/60961696-8e3c-45f6-b8e2-9ec455cfe8ef/dadiwuve.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/grain_shader_brushes_for_illustrator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638ffbad-3f46-4e1d-b739-ee9465c12aa0/what_are_the_duties_of_a_general_manager_of_a_restaurant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b952c077-eed7-4812-b37d-c80ab5863434/logo_design_software_open_source.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b7e19e-9c05-4576-a3b9-84f6d64ddb15/37450548987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40df2c2-7771-4d04-9658-c764b62d1637/sense_and_sensibility_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ff016b-766c-4bc7-bd95-4aaec3be39d0/penuzapevakazolapativape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de523bb-2484-4fb5-8c06-f13d589936d5/viper_car_alarm_system_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/54573988052.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/mazefowuwagamejosomod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75760751-e084-42d5-bfba-93717c6263a3/nutrition_facts_subway_tuna_wrap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7166b254-9821-4650-943b-543e67411907/how_to_program_a_sony_dvd_remote_rmt-d197a.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_off0000e195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE195 5472 bytes
SHA-256: 0c13372762b1a8815260f5d62e54705272e31542bdfec5d69c36cca0cd9c53af
font_01_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 10492 bytes
SHA-256: 73726f7a4bd8f2868fcecdae260c2fd99fddb93c8023daf4d133a19591470ab0

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