Malicious PDF — malware analysis report

Static analysis result for SHA-256 61826aa20fa5a1f4…

MALICIOUS

PDF

84.0 KB Created: 2020-12-26 18:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 36336dce6941ad0aa01a5a42dfceb733 SHA-1: b38545fcf4297607c2b31f22867f9c2382fea7fb SHA-256: 61826aa20fa5a1f43b8304349632b1789000d23065c59e4920f65d3340babf50
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'https://traffnew.ru/123?utm_term=borges+ficciones+pdf+english', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Borges ficciones pdf english'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=borges+ficciones+pdf+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5fa70124e6f40.pdfIn PDF document text
    • https://ronesina.weebly.com/uploads/1/3/4/7/134707074/6727166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5fc641d0004a6.pdfIn PDF document text
    • https://cdn.sqhk.co/namaboniki/E13oifX/52598530300.pdfIn PDF document text
    • https://cdn.sqhk.co/filumabit/iJQU8he/xumixomibirigaxitu.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/f7104b0b-f050-403e-a836-03a67184c740/19520220156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae83928e-9677-497d-a7d3-1e475ab94779/99844695444.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/careem_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/aluminum_sheet_metal_10_gauge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31b58b2-1ec5-47b2-8de1-e6b42f77cea3/race_car_games_2_players_y8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6624c94e-1424-45e8-ac06-898d22b80cfe/67967675457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fd23ae-b417-4b24-bd2b-33f1e9734c41/97880783087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269d7276-a237-455e-95f2-703e19cc3ded/dungeons_dragons_starter_set.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_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 4964 bytes
SHA-256: 17bc606f5701b36e768bb4e3886bc5a42de9dc370e52c109df9f582684597b89
font_01_sfnt_off00010cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB4 11440 bytes
SHA-256: 6f0723f55508f013cef96f8e9b073935e62399be8e92472f1b2d011f1a9404ed
font_02_sfnt_off0001332a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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