Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef8387fc70fd14b…

MALICIOUS

PDF

76.2 KB Created: 2020-12-04 11:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2b0c4ac0e468c3739eefac4537470545 SHA-1: 13a6af113d90e1a78c21524aeb56fb48f52c5af4 SHA-256: 4ef8387fc70fd14bbdcb4a7966f381892b428a2e74c61dcb82b72b9fbd247377
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a phishing and trojan threat. The presence of a 'download button' heuristic and an external URI pointing to a suspicious URL further supports a phishing attack pattern. The document body, though heavily obfuscated, contains text related to movie downloads, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=movies+counter+2.+0+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5fa4acc51878b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f928e3949cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5fb466ea93c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fbb685f91705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f9343c76b6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5fa3458fdeab8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58baf084698658e7dd217/t/5fc8461a43b29e7a5aef4f25/1606960667730/jetpack_joyride_mod_apk_download_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf296145a8629dc75c400/1606283926907/80251593320.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc1fa01cb3e0f5771961dda/1606547970956/38031499453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e8bf68-f205-4376-bc54-aabc6d9499fc/80820289545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3069e0a2757459bf0d6c4/t/5fc6839e3c6ccf69f341643c/1606845345412/irctc_rail_connect_app_old_version_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963ca5a6-427d-4ff5-9e45-60402168373f/2720570895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d346fc03-1d38-45d8-9c88-a3acb2390040/libro_psicologia_de_la_mentira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0c7e47-e625-458d-92be-0bdf1e8210c0/new_bedford_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb509c9f-4947-49aa-95dd-4f996aa8b91e/sofufokasabupasur.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C3 5188 bytes
SHA-256: 86003cd35cce2d80c3f4ded1795bd10ec686c6c4886ea6a5e0555b2ea562d66d
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 10744 bytes
SHA-256: c3ca45e0cc11fc6951e4ca1820b86fee2b68ff3b1a77ef368e31f884c8d9a11f
font_02_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 16436 bytes
SHA-256: f68e4b4d42456b360743c7acf69c82a49aa063f25f521dd5c66d8c69e3fa217a

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