Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbf67d12c2b9883…

MALICIOUS

PDF

59.9 KB Created: 2020-12-11 09:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 41e31abfecf09b7a6a772b45a51e6c25 SHA-1: 7b6bf5b9f454431123eff52346c0b2abf5af7dcf SHA-256: 0bbf67d12c2b988338ac3aca9f16f760441a8a894d7cc515b8c29e5da28dd117
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URLs suggest a phishing attempt, likely to trick users into downloading further malware or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?utm_term=free+calendar+template+feb+2019 In PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/f3957259231.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/novedenoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406793/normal_5fc3b3662aa65.pdfIn PDF document text
    • https://xuwukebi.weebly.com/uploads/1/3/4/4/134472968/2472322.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/5fc0ba71e9fc3622d52139a6/t/5fc259c82dd96f59183ae531/1606572513007/salagosowagol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f66f116eb00e3c4c456d/t/5fc2b71deaf37e3b64f5c3fe/1606596384090/kopuwukutolefodugona.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112aed26ff1194f74a888/t/5fcb2e0c9cf56e0e8b0d8ad8/1607151117203/19016315701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3dc35ec-daa6-44fe-a2c4-30a36eac2ef4/89904050621.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/converging_lens_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ec6885-7eeb-4cc0-ba81-b31ef887387f/gedeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0f699d104e5f15303db4/1606225771018/allshare_cast_ipad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc583aebf71053ccb2ee7e6/t/5fcd93fe33187724c40b5957/1607308287157/bagul.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_off0000af6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6C 5700 bytes
SHA-256: 8abcea78bbc41d5967012e33a9fccffa2c77915dfff77ef8d29a9b516dbbe086
font_01_sfnt_off0000c2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BA 9460 bytes
SHA-256: 35d01a69cdb76402c64894926975cbb5cffdcffa89a0e9d58c77b2a06fcc5784

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