Malicious PDF — malware analysis report

Static analysis result for SHA-256 306946b3939f1ac2…

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 23:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67913cf07990ea3ad0026a8fd446cc97 SHA-1: 7fa5bc5eee24428a34df20d6d707db44bc37a001 SHA-256: 306946b3939f1ac20b2a83d45571005715b5a1ecef8cc48cdf4ae7aa566de4a1
96 Risk Score

Malware Insights

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

The PDF file contains a lure for downloading Minecraft, which is a common tactic for distributing malware. The embedded URL points to a suspicious domain, and ClamAV detection confirms its malicious nature as a phishing trojan. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=minecraft+windows+10+free+download+1.16.20
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5fda6085de560.pdf
    • https://cdn-cms.f-static.net/uploads/4386091/normal_6045f24deee91.pdf
    • https://static.s123-cdn-static.com/uploads/4447433/normal_5fece60b2ff70.pdf
    • http://juwaniwabi.medianewsonline.com/calendario_escolar_2020_asturias.pdf
    • http://nemugub.mywebcommunity.org/chess_puzzle_king_solutions.pdf
    • https://cdn-cms.f-static.net/uploads/4409417/normal_6014f68be6518.pdf
    • https://cdn-cms.f-static.net/uploads/4386834/normal_601c64a12d18c.pdf
    • https://cdn-cms.f-static.net/uploads/4487894/normal_603ccc94c6601.pdf
    • http://motovepom.iblogger.org/oster_classic_series_blender_reviews.pdf
    • http://gapewikegolunop.iblogger.org/95970763443.pdf
    • http://zijojot.22web.org/biodegradability_definition.pdf
    • http://xemizawufogutuf.scienceontheweb.net/1573418811.pdf
    • https://static.s123-cdn-static.com/uploads/4423714/normal_5fe100c2ee461.pdf
    • https://cdn-cms.f-static.net/uploads/4494681/normal_605c85fb22eb7.pdf
    • http://lukiduxipapep.mywebcommunity.org/fiwotubuta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b53cbe88-b3fd-4ae1-9a54-737e244a6b91/dizokirorefevezadijimetaw.pdf
    • https://uploads.strikinglycdn.com/files/42ef0d67-f7de-4a4a-a00b-7873aefa204a/what_does_an_it_systems_engineer_do.pdf
    • https://uploads.strikinglycdn.com/files/f6e07343-4bb9-497f-8a4e-624c75cc8bc3/sportspower_40_mini_trampoline_reviews.pdf
    • http://pemuvem.epizy.com/siguleduledonobuf.pdf
    • https://uploads.strikinglycdn.com/files/6ec72a0a-359a-4cbf-899a-44b9aaafca1a/53594033459.pdf
    • http://disoluje.myartsonline.com/ms_project_2007_manual_free_download.pdf
    • https://uploads.strikinglycdn.com/files/31fe7bf2-61f5-469f-a2c0-256a823a99ea/introduction_to_linguistics_course_outline.pdf
    • https://uploads.strikinglycdn.com/files/aeab988d-1124-4245-9588-7266e1cca436/what_happens_if_my_license_expires_during_covid_illinois.pdf
    • https://uploads.strikinglycdn.com/files/d9e82d2d-53ce-4859-bebd-f6f3c95002cc/how_to_fix_homelite_pressure_washer_pump.pdf
    • https://uploads.strikinglycdn.com/files/9cd474ad-ea76-4c6e-be01-36cd3c6a4907/riselebabimipiximuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd71.bin
0c215db98776f6c32115f45c257106846c94a7cd2443780b6ac4a255241b5206		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD71 5624 bytes
font_01_sfnt_off000110cb.bin
adb1db47db60d353d7c29d3d6222027b98bfaf5bf8a41ed9d7c71e81e3b0264a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 10308 bytes

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