Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ab191d4deeee38…

MALICIOUS

PDF

86.0 KB Created: 2020-12-21 18:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a8b6c59fa33dab30e7b96851b8269d30 SHA-1: 218290ab4876c89d4533249daba0ae8115ebbe05 SHA-256: b2ab191d4deeee38d471269852f44ceb20e5413b89585f9ca65543f8ef9e02b6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffnew.ru/aws?utm_term=song+loosen+up+my+buttons', which is likely used to deliver a secondary payload or conduct a phishing attack. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=song+loosen+up+my+buttons PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c394a4b-e8af-413e-bee0-a020b0e4c9f6/norton_360_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/52433203432.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/bmw_m4_convertible_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402f1d8a-1a31-465f-b9d3-373c088347ab/tugaxudarajagisar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79be1d743eb43444a2f45/t/5fd681df0f11661d4c30aff4/1607893472156/camera_face_age_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fb3369-65fb-4695-afd8-59fa1a140246/tiximekunaboriwowisut.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/plano_de_aula_educao_infantil_formas_geometricas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467e613b-0ec2-42e3-b321-d7f1041aabe9/words_that_start_with_s_to_describe_someone_negatively.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8dedb19-b8f5-4624-a513-5af317145c28/la_llorona_de_mazatlan_chapter_4.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/mp3juices_downloader_application.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_off00010df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF1 5176 bytes
SHA-256: 5bd1027b1eb5c7831e1d427e689f018fc0242f32e7330e11af54f5ce3cec1114
font_01_sfnt_off00011f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F89 15204 bytes
SHA-256: 1566d5a59e4b32f3057242282b5450e3ba7f8c834c17613d13143327561d2be6