Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb17134557dbdd1…

MALICIOUS

PDF

67.6 KB Created: 2021-01-08 08:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 778c1cefabd79df35848150c8765fae2 SHA-1: 9dc002b039d1d8f128a85da02dab42140c5ebfae SHA-256: 6eb17134557dbdd1c3fe34e9610173f2dad7bc3898473ab470ae023de437abd5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://traffset.ru/123?utm_term=family+life+worksheet, which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?utm_term=family+life+worksheet PDF link annotation
    • https://cdn.sqhk.co/zupuguvawaj/ijaUOjf/jexizal.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/f6gfVUf/strategy_business_magazine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388162/normal_5feb421895036.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/gexepu.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/803650e6-1191-4f2b-b23c-9b681615aff4/gebaretagipizifagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271685b2-af1a-4027-918a-970e46f4a640/6423224572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a1d3ec-664c-4225-835c-62daf53169c5/59621780837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7d5875-a449-403d-99f4-2ff0d0df2b8b/lorax_worksheets_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a6149d-88e4-4c1d-b3ef-b49d3b483d6b/komplikationer_vid_ortopediska_trauman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71ff6c7-759d-4db4-859d-206783d69b1a/true_skate_cheat_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5192d0-b9a3-4901-80ea-3e154bb40902/paul_in_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af447b20-4b27-43bd-aafa-b33ec3020dff/rocket_launcher_fortnite_vaulted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932fdab3-e565-422f-8227-545929de5c6b/dogajufadenomun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fdd4be-5052-4caf-bb4c-f0ec18f7b2ea/if_i_were_a_bell_instrumental_with_lyrics.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_off0000cc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC35 5220 bytes
SHA-256: 4dd1d50f0145ea4589fd03e8453f890df552faf676579af7e179a49da7bcd311
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 10548 bytes
SHA-256: 5c14036e3e3bfe7258992a9d1d450a36a18bb753b8402aa8522e47c07ac09faa

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