Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a761ea9462b71ac…

MALICIOUS

PDF

63.3 KB Created: 2020-11-24 09:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 23f577664ab327f1920a2b58428c8be2 SHA-1: d71f3af2a69e451bac44c498d0eae0c7171a1eb5 SHA-256: 3a761ea9462b71acd2eea012d806057e03990d0cd2cbaea815ef7e4ceb84a9cf
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a website seemingly related to movie songs, likely a lure for phishing or malware distribution. ClamAV and ML classifiers strongly indicate maliciousness. The presence of an external URI and the overall structure suggest an attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/wb?keyword=brahma%20movie%20songs%20%20in%20naa%20songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f86fbe813bd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_5fbc895ce9e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f875b10b1b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_5f9d1cf5ba46d.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/novifamigot/56666246592.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/8537037036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd9ac28-5c9e-4ad5-aec1-5c96474bd719/les_caractC3A9ristiques_du_romantisme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6907d0c6-52ea-4827-a75c-a777e11f9f8c/4255806021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc879a6-ebb3-4af8-ae69-55f6318599a6/82878998370.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/memorial_sheet_for_karl_liebknecht_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/radibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6baa66-7d2e-48ad-9247-f048c5a9a2a7/cheng_gu_suan_ming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb8cc48-b731-494f-bd75-ef4bb83d11a9/gfwc-nc_state_convention.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445ee36e-c766-42a6-aeed-291d3cacc679/electric_bike_buying_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c280abc6-e4fb-42c3-9b2f-323536b6ccb3/casey_jr_high_mt_vernon_il.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_off0000ba09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA09 5176 bytes
SHA-256: e8334149e2127662e0f38ef13b1e9e1d8c51f40f40115366da7f55ab05249885
font_01_sfnt_off0000cb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB81 11040 bytes
SHA-256: 000879a0a02428dbc823a0cd88841320175d6b5f8515b537e7c424238aa61d64

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