Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43ce612f1beb8db…

MALICIOUS

PDF

67.2 KB Created: 2020-12-15 08:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 68950134c6e252223764953a08a6ee68 SHA-1: e0833abcadc75a5c0b4cf847b608b7dabddb6f99 SHA-256: d43ce612f1beb8dbcb6e9e8137ca8f3488d7b1ec95ab36568f753545f69e835a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://trafffe.ru/123?utm_term=date+a+live+episode+13', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of the malicious URL and the overall detection verdict strongly suggest a malicious intent.

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://trafffe.ru/123?utm_term=date+a+live+episode+13 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487647/normal_5fc4d1a719f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fc0afa5936fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fd7ed27f04e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_5fcbeb39b58e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_5fbe2663f3a32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5fd27beb00bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fb2c78c96a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8998cf14a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fabc4c3c54b7.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/radubozufiwo/zombie_cranberries_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198142d1-2e9d-45dd-934d-5a19eb760a39/weight_lifting_exercise_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/19272339337.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79ecceddbb05c68963a2e/t/5fc8bc1e13f8d93bf20bf24d/1606990881330/awesome_octopus_thigh_tattoo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4086b97992eb55bb7f9/t/5fc45e549d7936484019dd11/1606704726775/wafegenota.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_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 5132 bytes
SHA-256: 6592232b021abee2e07c38f12d97c8c5d8c1e04754671ae125e448bc86738ad1
font_01_sfnt_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 9788 bytes
SHA-256: 9763f631952444ce5a17f865d1ab85f5afd98dff62789c4198f18601e3d3667f

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