Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdfae96030fdbf8…

MALICIOUS

PDF

69.9 KB Created: 2020-12-17 00:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5841bde993b21b4572f15ea46d341fed SHA-1: 1895ee0c3691fd9f247830422c29ed067fb2d041 SHA-256: 0bdfae96030fdbf8690c0f6aa9b8354b942bcd9035a29c486dd9bdb01159ddb3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document body, though heavily obfuscated, suggests a lure related to popular search terms to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=monopoly+ariana+grande+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5fa3eb69160cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fd63afc1358d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fa645a46f653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f99884234546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5fb34eabb6472.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/magapeguwabe/using_algebraic_geometry.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff2111f6a4198480a438/t/5fc0f72c3c6ccf69f3805173/1606481709960/28570786659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79983ff8-0f8d-48c1-ab35-5a227129a56c/3878480088.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0eb7bc819f1cf4a01751/1606291128259/el_escudero_de_dios_gratis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6b1208845d092483122d/1606380307991/the_blob_1988.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc009dd8787e87989674e7e/t/5fcf686e8b174454e99f3d5c/1607428209033/billiard_free_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/37876165180.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1cb4ea95a9497c04e2e0/t/5fce80b93685ea502c26568a/1607368890107/58297677281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16871d6a-73f7-4453-a250-5784ca1bc4c7/alfajores_de_maicena_receta_en_tazas.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_off0000cff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF0 5348 bytes
SHA-256: 5ee51f5692649e961601b73c7becbed44aa6ff819d74d5f2d03fbf9d64071005
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 11564 bytes
SHA-256: 32b4f468f2fe6e0086b29de692964729cb63d41eee8e036f395846a6117c2aa1

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