Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e5ef0273576206…

MALICIOUS

PDF

71.9 KB Created: 2021-03-17 17:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c18616766d2018ae162162f0f36b0b86 SHA-1: 321340a3841a3b2b1ee2388c47d7ea6f6488bbba SHA-256: c9e5ef0273576206b1a552bc9b9c05b8e1af2f97c544d249d314b21256971a86
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body is heavily obfuscated, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting 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://resalured.ru/strik?utm_term=beats+by+dr+dre+solo+hd+wired PDF link annotation
    • http://galoomer.online/xawazetagulogizotit8750.pdfIn PDF document text
    • http://datinge.site/162407924650vwx0.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/iHicxia/vixakepudulak.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/ZIhjeZr/kanashimi_wa_aurora_ni_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/rakapuvad/WieSkRj/99898102778.pdfIn PDF document text
    • https://cdn.sqhk.co/budafitanu/9hcPjeu/asteroid_pack_apk_download.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://uploads.strikinglycdn.com/files/ebaabafc-0677-49c0-990b-7b84faae7906/diwabipafemorale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9daf3b36-4467-4368-bddc-911599b00d71/metric_mania_conversion_practice_worksheet_answers_key.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/monthly_business_budget_template_excel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75cc055-ef32-48a2-862d-8ce59169bd1c/73599475302.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/class_diagram_for_hospital_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/87105402356.pdfIn PDF document text
    • http://kejufunekopal.epizy.com/67359847515.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/28467493509.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/29337034238.pdfIn PDF document text
    • http://zizumanoxiv.epizy.com/vuvezutajeveto.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/90131414699.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_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 4980 bytes
SHA-256: de64d754ed831d65dfa56c92b9e8aa4faa38f5c243623e1cbabef5243572c43f
font_01_sfnt_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 9928 bytes
SHA-256: 51133cb9b41a857ac5b764663530f23840b6bd0d69b2241f9e4e7a65dddeef3e
font_02_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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