Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0449b1a67c9f038…

MALICIOUS

PDF

73.0 KB Created: 2021-03-17 01:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13344cc7511209554ff5c312a8dd67c3 SHA-1: 984943589141d00b31d7612885d634ba12d59952 SHA-256: e0449b1a67c9f038f118c9786b75109c15c48993f514852f5c85a066aa5b3a4e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=2019+prevost+h3-45+for+sale PDF link annotation
    • http://lumobumekola.getenjoyment.net/85054190140.pdfIn PDF document text
    • http://bifozitixexidad.mygamesonline.org/xivezufukawinodezuzezekip.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/abOTO0j/95298366315.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/CoV6gie/paririduboroxirefe.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/50022702278.pdfIn PDF document text
    • http://vegunax.getenjoyment.net/59413191843.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/avalon_astoria_pellet_stove_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/gigjhgX/roku_secret_menu_bitrate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_34896209f8f94c0ea0b63c17e238e4c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6045260-ece4-49b8-b70f-bdc2b5cfd018/pagonerepuzemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b367e3-3025-4de7-84de-c524190964d9/66505292589.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/gewibegu.pdfIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_2f99402e105740f288ce416bc055f343.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/857f8747-5b2d-4a1d-aeba-dd6a20659f62/97244807967.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/teaching_english_as_a_foreign_language_free_online_course.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/getting_rid_of_coliform_in_well_water.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_28b429003b704d3fbce7bbe1ae177298.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/esboo_agua_transformada_em_vinho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9f4364-4420-443d-9440-47d72370351f/niwelifarutav.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_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 5844 bytes
SHA-256: 4bef38df802407fbef85c5e2c23531e12993396d98f6f8f3c6004ab81d1af8d6
font_01_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 11256 bytes
SHA-256: 7c84c50651e65f5d45866ddf812956963912d3d556e07bd4bcc19f29de2d25d7

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