Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec15b76fca73888c…

MALICIOUS

PDF

70.6 KB Created: 2020-11-24 02:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 375737ab1e642c38ade6ef69c51993ae SHA-1: d56d490bc29c50d80c10abff9d3c0e0c8fea007d SHA-256: ec15b76fca73888c507072da6041af8d3353561a3bded5075c4935825b86b181
154 Risk Score

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://cctraff.ru/123?utm_term=cancer+man+and+capricorn+woman+love+compatibility In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f99d970ec741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_5fa922b852686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fb289b7c8504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5faf8d4fa4fda.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/492996fc-3c4c-4aa0-869d-b89fa551b714/como_crear_macros_en_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/9355260967.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/google_support_case_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9557f6a2-9a25-4cfb-99b1-2e51b80de193/bowling_king_hack_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/pokemon_ash_gray_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d6389b-a4b3-4411-9e77-4b80091e083e/rotation_vs_revolution_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/save_the_sheriff_unblocked_pig.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/powerschool_burke_county_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/19478542448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c091df-a05c-41ad-b9e0-79a0b62f544f/29324281220.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/28971054643.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/37128737167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3c147f-3785-40bb-9c6b-c82cd4e5598c/zugugerireladorosa.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_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 5340 bytes
SHA-256: 64ad07c548237efc4c8800ef694d734e5c24a22cb8d4a9e3ebbc9c89630cb3b9
font_01_sfnt_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 9740 bytes
SHA-256: 6210243ab2ff9b183c8362b34f79d786bfc047e846092890e47bdb069e778230