Malicious PDF — malware analysis report

Static analysis result for SHA-256 78af007f83cd82a4…

MALICIOUS

PDF

77.7 KB Created: 2021-02-15 13:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d58a14d71b47bf4766f2f4e1949caf80 SHA-1: 3b657fed5cee529892c80021b4c95fd1151eaab4 SHA-256: 78af007f83cd82a406892cf24c021ccb40c2e5bfb70434c1f032166acb0ae4fb
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=powers+of+i+worksheet', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Powers of i worksheet'. No scripts were extracted, but the presence of external URLs and the nature of the detection indicate a malicious intent to redirect the user to a compromised resource.

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://jacksth.ru/wix?keyword=powers+of+i+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501962/normal_5fcabc2012803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5ffa33b5b38dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fd66fa212e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_6022a42ea039d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5ffef9c05ecda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fca77cd5390b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5fc6d9ffce21c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_6012f9d08e7f8.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://s3.amazonaws.com/kigavanus/authentication_client_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/hermit_crab_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/coping_with_depression_and_anxiety_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/88109247328.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/rijaruve.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/6257525985.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/50593398270.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_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 4452 bytes
SHA-256: 8a22b410e012027e06bd9894c889365f060dc26bf717d0f4435677bdc75dcfaa
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10756 bytes
SHA-256: 41ab33c6aa4bdf9e36d3f4be4d7fe6d9701223cd8d340b4a693465560069b6c6
font_02_sfnt_off00011bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.