Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ebcb4b1a2d28ba…

MALICIOUS

PDF

161.5 KB Created: 2021-03-08 12:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0f4fe162c5bdd22858483e813dfbe974 SHA-1: 9751f7a379b60305f91a184d0fcc714bb541036b SHA-256: c6ebcb4b1a2d28bab6241c5d1bb797f6423be072bd293e57339dbe415dcea276
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by an ML classifier as malicious. It contains a heuristic indicating a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running arbitrary code. The embedded URL points to a suspicious domain, likely serving as a download source for a secondary payload. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/123?utm_term=advertising+management+pdf+for+mba PDF link annotation
    • https://cdn.sqhk.co/zifeduwa/jOijXgc/past_future_song.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/jfEhahd/potuwodozosisivuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5ff2498e7d86b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_603bd0117ce7f.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/aSejFja/78831311145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454049/normal_602c58bbe6fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/sHici17/fox_sports_go_app_dish_network.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/v1gPjgg/rope_binding_guitar.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/hjaji9l/vatidufar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_600811ac5f005.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/hishdij/3689188246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_5fdd7e922f3f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5ffb9fd0b34ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422879/normal_5fe687d4a484a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fe2d25a901a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/KphdXii/turbo_driving_racing_3d_hack_download_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivewigaviris.rf.gd/restaurant_billing_system_system_java_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a3ea7a-c310-41b0-a9ec-ace4cdd3ee4e/how_to_start_a_pellet_stove_with_gel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c010c54-d42b-4c0d-9d47-636b3abaa65b/que_es_la_carcasa_de_la_caja_de_cambios.pdfIn PDF document text
    • http://ridibodivusunob.rf.gd/73762825899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a4afae-66c6-4548-b813-a200d9f83c2a/romeo_juliet_songs_download_starmusiq.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_off00023574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23574 2828 bytes
SHA-256: 5fccc4b93669808a911be510fa35354615011d06cae0a9a774c0ef2e9a75b465
font_01_sfnt_off00023f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F7E 5520 bytes
SHA-256: 1e11c6d5b64ade1a2e3dbc5ed380ebf95b9e95ab7cd0bc2c1d3b1d8c99d798c9
font_02_sfnt_off0002522e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2522E 11100 bytes
SHA-256: 5dc955d0b554d61e4292ad6c25f885a7c15badbf2a5bdbf1af5ac92387f4a37a

Open this report in the interactive analyzer, or submit your own file for analysis.