Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b68d74a6e6d50f8…

MALICIOUS

PDF

82.7 KB Created: 2021-05-23 17:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f2b9208165505a5d1b430afb905c0e0b SHA-1: 722e2b27cc96edbbd20904ee2a99ef89aae62751 SHA-256: 8b68d74a6e6d50f8e2e528f4e61e130364cc4d54c17e83c85a4720c3562e4045
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI and the overall detection profile point towards a phishing lure.

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://golowaki.ru/strik?utm_term=how+to+make+moonshine+still+step+by+step PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5fc696eb5d9de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_6014467d824c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_606dfdca85e1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/budisopipamepikus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875df301-e315-4c39-8c16-dee5cef9149e/reading_comprehension_practice_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5b0e2d-3f14-4269-bd01-f7d140e85580/70751735881.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/pensar_rpido_pensar_despacio_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/bemodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6e657f-3d4d-4158-92cb-993a4044b99f/kirofamiropataf.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/animation_start_delay_android.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/melhor_app_espio_para_android_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/sakiwexapefobejofegozivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6f5acf-41fd-4b42-9235-97b8bd5e586c/82528021121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb02e33a-eac6-43b0-b3c4-b8e9125a6b6f/35131314241.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/calorimetry_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/gf07_mini_gps_real_time_car_locator_tracker_magnetic.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/jojivedetivogafobojesiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/melologa.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_off00010515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10515 5324 bytes
SHA-256: 7f3bee9d6581e39ca2e1c24da38b80b1403b5972a850ce802379a628383b0b85
font_01_sfnt_off00011718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 11560 bytes
SHA-256: d9b1d0f7514b6c3041525a641b72bfef101254ec62c56b563f17c2191dc86244

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