Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54ac86085525260…

MALICIOUS

PDF

72.1 KB Created: 2021-05-29 12:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3c68707a88c931a1239b53618e2136bf SHA-1: 53d88b4ff0028a67e41d45cbb945a2ac37931e5b SHA-256: f54ac8608552526028ca0a399fcf58a8489de454ff64da4456a95222d19d9e31
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The presence of a 'download button' heuristic suggests a lure to trick the user into downloading a payload. The embedded URL points to a suspicious domain, likely serving as the source for this malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/123?utm_term=bpelsg+corner+record+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474719/normal_5ff9c40c43fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_601dc059ccc55.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/0bb1ead7-feef-4ce3-8c96-abae7e10fa1c/zagud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a28bc2-b85e-42c9-9f4e-96f743ffbfc0/the_beginning_of_everything_book_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598de134-48c8-4400-b41d-1ed712d214c3/84898496548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a692659c-349d-451b-a23a-2cbd7577b80d/60625269409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f09ebd-5a2d-4c2a-beae-d2f678983753/71374558403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3537a099-3e0d-4a06-8556-530f65bc568a/what_does_hamashiach_mean_in_hebrew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95158ab3-dc6c-4539-8c18-06185a59531c/list_of_all_dd_5e_subclasses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed55d5d-3ffa-420e-94d2-413ad5c6ca2b/78316302102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf7c2f7-7d56-4cb5-be28-70118821e3bb/39970023386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77612f1-998d-476d-abf3-731b4910b0c4/55164952864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d593fd-9ae0-4428-875d-6428dd433748/moldes_de_foami_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8da13b3-ec5d-4419-b2d8-a4bcb7777b3f/far_cry_5_uplay_r1_loader64.dll_unknown_file_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559faad9-50cd-4841-bf3e-e1b2f5517312/vozefurufutedebej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314c1ba1-dd22-4073-9b87-ab69ac74ebd9/besusirinalimuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0686b0b0-7917-4aa3-ba16-4812d20dd48e/resumen_el_vendedor_mas_grande_del_mundo_og_mandino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3202da-8857-468c-a7fb-4dddea2d8d4f/que_puedo_tomar_para_durar_mas_en_la_cama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82478bee-5c4a-4805-8414-09642e0b3937/bissell_little_green_proheat_pet_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552567a5-87f3-45a7-8fc3-204d44e7d567/journey_to_the_center_of_the_earth_1959_duck.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_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 5312 bytes
SHA-256: 855927deca36041f603525a2ff9cfd04de6b2353880eb19f45333c2f5af18394
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 11572 bytes
SHA-256: b4b92d3993b35695500420d1a0b093461f139ca9fd73f04213a233a811e91a66