Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8f048f81830e94…

MALICIOUS

PDF

75.6 KB Created: 2020-12-17 12:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 11dfa0c8f1c1eee76bc4848f49df3ad5 SHA-1: 24e889fcd367aa05a9f1bd6826750f253e7593bd SHA-256: 8e8f048f81830e94d5154584ca5506eceb7eb5a401d28ee6afac404cd1a13060
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=hp+pavilion+dv4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_5fab7eb04f92c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c39a5e-436a-4611-92a7-db2941ba49c2/pizagumufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6039f7-fd81-410e-9d8e-b75644738223/8365646936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b48522-1b03-4f1e-b1ee-e5e32142da60/pifegemowiwudilodub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207d7275-c7d7-4cdb-bf60-c1aef30a24de/klein_isd_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601b8214-ddcf-4625-94e6-7b31d8e02399/51875161390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e0b4d9-f9ab-4244-9a2f-514ecf2837da/ap_psychology_study_guide_unit_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6f7848-08eb-410f-b82a-2b656d528365/what_area_code_is_702_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d89268-999d-4ee8-8741-b46d22418831/56527776284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c13964-a341-4956-980c-d44f67f84221/17602862915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb75339-e4dc-43fa-a89f-81975734cee9/thunderous_rumble_in_the_highlands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f579361-2e87-44ca-9405-e3a2e03f1eb1/96598731424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224d3897-4340-49b0-864d-f0d71adcc5f5/super_best_friends_forever.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_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 4788 bytes
SHA-256: a591dbf9022a3aa851d825083cb91f186442dbf9ef7a55a1b58e51a1b66370f1
font_01_sfnt_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 10832 bytes
SHA-256: 51fe1be1ee75a59264c1274c936d3c1ad308600894389a57030562a8bd265102

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