Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc0543ee52172be…

MALICIOUS

PDF

127.1 KB Created: 2021-03-22 08:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b4fac46a69f268cb9495bc50bde895 SHA-1: 2da21cf7ff4c443cd75497e4f546dda896f953ef SHA-256: 0dc0543ee52172be1a35fea8b695e2592abd4d634d2c0696a8cb2d1c80f4a348
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which is flagged as malicious and appears to be the primary lure. The document body, though heavily obfuscated, suggests a theme related to 'realistic fiction novels for middle schoolers' to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate malicious activity, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=realistic+fiction+novels+for+middle+schoolers
    • http://vurovolapoza.mygamesonline.org/16659881574.pdf
    • http://tufofol.medianewsonline.com/1778335473.pdf
    • http://kafofal.mygamesonline.org/bumaninekaxinilowezof.pdf
    • https://cdn.sqhk.co/zidexamuwela/giCZibe/26298823112.pdf
    • http://fopekoriw.sportsontheweb.net/job_vocabulary_worksheets.pdf
    • https://cdn.sqhk.co/vofemolat/haggfof/81487050795.pdf
    • http://fosavaxenu.mypressonline.com/upsc_blank_answer_sheet_format_vision.pdf
    • http://manamuposa.getenjoyment.net/venn_diagram_shading_worksheet.pdf
    • https://migabodunezo.weebly.com/uploads/1/3/4/5/134587819/bekumuriba.pdf
    • http://zekifafeter.scienceontheweb.net/ielts_simon_writing_task_2_free_download.pdf
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/4043174.pdf
    • https://cdn.sqhk.co/mubutuve/uigQ27W/old_bollywood_songs_hd_video_free.pdf
    • http://zugugalepew.mypressonline.com/48947462070.pdf
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/fujafijo.pdf
    • https://vavuwujaxozu.weebly.com/uploads/1/3/1/0/131070334/794619.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cbe7020f-811f-486a-acc9-bf1cba6f470d/waxitidoribunebetil.pdf
    • http://rususekobijo.myartsonline.com/all_my_sons_act_1_summary_sparknotes.pdf
    • http://sogurorirerew.onlinewebshop.net/30528546456.pdf
    • http://raziwisubuza.rf.gd/bexumuvose.pdf
    • https://uploads.strikinglycdn.com/files/93ad8eac-8043-45b8-bc00-f4ed1e980d3c/roxop.pdf
    • https://uploads.strikinglycdn.com/files/a5b3eeda-186c-44ee-813e-75fd7a24c09b/32002260303.pdf
    • http://mogorixonub.rf.gd/bsp_pipe_fittings.pdf
    • https://uploads.strikinglycdn.com/files/89c443f7-44ae-4d18-af35-6d28d332fcb0/nadedixakasebi.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_off0001b45c.bin
315fc94957827cef3a1502cadb4051ca940bb8e0d2cddd5dce1853ed31e13ad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B45C 5328 bytes
font_01_sfnt_off0001c65c.bin
8f99cdbf19516d10733d8f886527e86981e8d374c9a2e497fe898f0657991d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C65C 11252 bytes

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