Malicious PDF — malware analysis report

Static analysis result for SHA-256 d578d9c5a4c98405…

MALICIOUS

PDF

81.9 KB Created: 2021-03-10 00:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8dae596f7559c924076dcdad6de80b1 SHA-1: 7cdf5fc5ea7d347569363716440bd570de59c33b SHA-256: d578d9c5a4c984053ed1d0b9dd5212e8685fce821ef990635e890b232f4265d9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. Although the document body is heavily obfuscated, the presence of the external URI suggests a social engineering attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=belly+fat+exercise+video
    • http://findattime.com/dewalt_20v_sds_hammer_drill_home_depotseehc.pdf
    • http://snegny.com/khmer_calendar_2017n641l.pdf
    • https://cdn.sqhk.co/luwesefizi/cididUV/soccer_world_cup_schedule.pdf
    • http://doorstepcomputers.com/75743443013v5rq0.pdf
    • http://ziwumununazofal.iblogger.org/windows_commands_not_working.pdf
    • https://cdn.sqhk.co/puvubuzu/6IiiijD/15458646594.pdf
    • https://cdn.sqhk.co/wexovezojab/gewbTjj/semojibavevikitibeno.pdf
    • https://cdn.sqhk.co/guvevifowo/4jbhfgi/beef_packer_margins_march_2020.pdf
    • https://cdn.sqhk.co/kerametunal/OKif8bT/cic_infection_control_study_guide.pdf
    • http://connexion-amelii.xyz/41738095757ivh8q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jezedor.epizy.com/landscape_architecture_basics.pdf
    • https://uploads.strikinglycdn.com/files/536fd3c3-8576-4628-8fa3-2198541c35d8/how_do_you_fix_automatic_locking_hubs.pdf
    • https://uploads.strikinglycdn.com/files/cec4cedd-e41a-463d-a45d-c9a1ab11a552/uppababy_vista_v2_jordan.pdf
    • https://uploads.strikinglycdn.com/files/3b1663c0-b901-4682-b43f-6d591471d764/integral_calculus_by_gorakh_prasad_free_download.pdf
    • https://uploads.strikinglycdn.com/files/ed2e28b9-15ec-4c9e-a315-879009424a02/how_to_write_a_paragraph_3rd_grade.pdf
    • http://xugamux.epizy.com/37942291898.pdf
    • https://uploads.strikinglycdn.com/files/b106e0be-315f-4697-9a66-b61458a6dfb7/27703894345.pdf
    • http://pufovipejofag.epizy.com/does_timex_still_make_indiglo_watches.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72c.bin
f30a83f7006bd241c3570e667508d5cef271cabaeae778d0298150694159e13c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 4976 bytes
font_01_sfnt_off0001083a.bin
1c04b4b1184d5a7bb0fdd39745df8b72dcc697d754eb26cf185fee9e5ca58dc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 10676 bytes
font_02_sfnt_off00012cc0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 4324 bytes