Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be9c75e640ea1e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-04 03:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 99c8a1bc34e91f92b3cf5e531e7b0af6 SHA-1: 08f140ed1510de2b1b5c2f7c62540252d8fb1883 SHA-256: f7be9c75e640ea1e81aeaab091bb6dbdfec0206196f4a6162b5424ef3e70d323
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 ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'phrasal verbs'. The presence of an external URI and the ClamAV detection strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=most+common+phrasal+verbs+with+examples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428045/normal_5fdf2a9aed8b9.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/stihl_trimmers_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_603e8b9aa1468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fe639e51ac11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477183/normal_5fe0b4a281197.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/jZJUEig/easy_world_history_quiz_questions_and_answers.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/javuvikukanogudidaz.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/doxokawegutire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370088/normal_5fed775e8c2a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_602175f32b87b.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/fesedarowatepomedorel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5ff4a93f94c7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luropi/vujogewizudowoze.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/pukum.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/calling_all_the_monsters_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/jnc_8_guidelines_for_diagnosing_hypertension.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/viwonu.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/90608038328.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/56367916343.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_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 5328 bytes
SHA-256: b56ebfc6480215eb891e5a67deba14b8b07f4cf3d705a85e38dc7ac85247d0b4
font_01_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 10208 bytes
SHA-256: 4377ca5186de6f16903d2eca4ef6ab87c4e6f6a3f217af71ab59d85029b14a61
font_02_sfnt_off00011cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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