Malicious PDF — malware analysis report

Static analysis result for SHA-256 270331b9c50bd3ba…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 00:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8045d1d6bc8223c4aebd475a9ba38410 SHA-1: 5e7bfe9864b16dbf54d61b463ececc3a63ee3090 SHA-256: 270331b9c50bd3bae4d06969e5ceb735a068394787c33b3319ec8a1582a1461f
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain that is likely hosting malware, disguised as a software download. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the phishing lure.

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://jacksth.ru/wix?keyword=kingroot+4.1+2+apk+free+download
    • http://registrat.space/anime_asagao_to_kase-_sanhlqkj.pdf
    • http://visezuxopusifik.iblogger.org/74445449665.pdf
    • http://item-mask.top/hydroxychloroquine_retinopathy_screening_guidelinesz4rwr.pdf
    • http://dobomasinuraz.iblogger.org/cds_paper_1_2019_answer_key.pdf
    • http://steelsho3.club/tuzatimomolonamipumuf6oun.pdf
    • http://redita.fun/sample_decision_matrix_templatesd3dm.pdf
    • http://fc-aromat.ru/jopumolanubezazow3zog.pdf
    • http://jobauthor.online/origami_crane_ornament_tutorialkhtjj.pdf
    • http://itdiscount.pro/5e_character_sheet_spreadsheeta46qe.pdf
    • http://fakts.design/sunixoxuwejesasu8zkut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fivajopafovile.rf.gd/deere_and_company_annual_report_2016.pdf
    • https://s3.amazonaws.com/xuzed/80495482801.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_cc4fcaf175194cefa40d9a680ceeae07.pdf?index=true
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_9592f92e659f401aac3b8dd1194d8919.pdf?index=true
    • https://uploads.strikinglycdn.com/files/afefbd99-c2ee-4cce-a53f-88901ae2d495/psychological_assessment_services_fredericksburg_va.pdf
    • https://uploads.strikinglycdn.com/files/d56bc9be-b7ae-4a53-a540-4a9a8dd8d410/how_to_reset_voicemail_password_on_mitel_5330e_ip_phone.pdf
    • https://s3.amazonaws.com/fefurorobumi/blackberry_10_os_software_update.pdf
    • https://s3.amazonaws.com/matogapibelifiv/sebinomitas.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_off0000ec68.bin
9a607b54c64bd4b773c34ce88d965c543d15c997573c1607d0c29a731f6cc717
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 5460 bytes
font_01_sfnt_off0000ff41.bin
243e2bcdaddb5abbf699323c3df951bebdc29a8eeef2f3bc347ed3ca54b0ffb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 10728 bytes