Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be15acf6e41e5f9…

MALICIOUS

PDF

49.4 KB Created: 2020-11-09 07:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9076cafcd070b11eccb558b02a0c347b SHA-1: 9d6ca479930d66048b18ed71823bce520adcb5f7 SHA-256: 0be15acf6e41e5f90fd626a60ac103465b9845c8da78b8b13e9cc4590b360c44
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 1.0000

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?keyword=download+garmin+drive+61+manual PDF link annotation
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/sadenukifirew_tiloxisu_gujesovijagux_jazuvubusawolo.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/waxumowaliro.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/8983da73-2b7a-4ca2-b9a0-3ef718caab0c/starcraft_2_coop_guide_fenix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ece9b2d-930d-47c4-aa8c-a81c19a1fd1d/pawoxoka.pdfIn PDF document text
    • https://kedijabu.files.wordpress.com/2020/11/lazipipoduzoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba26a64a-96e2-4807-ad14-8b16d1d1309d/conto_de_bruxa_bom_de_dois_coraes.pdfIn PDF document text
    • https://wejokodejika.files.wordpress.com/2020/11/bloody_v7_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457a052c-065a-4cbb-9733-c340a32b8778/26758198268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2cfdf0-e8f2-4e4f-9a51-321c5232f515/case_service_manual.pdfIn PDF document text
    • https://toxuzan.files.wordpress.com/2020/11/88099255520.pdfIn PDF document text
    • https://vabowuzi.files.wordpress.com/2020/11/main_tera_hero_movie_download_openlo.pdfIn PDF document text
    • https://konomalipu.files.wordpress.com/2020/11/lebevofotagedivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97a5a55-283b-4ed6-a5f0-169a8173fb0c/lotewulup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13c27ef-4909-4d90-b0c7-4fda99a1e0f3/siwadovilidunedifofinawil.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC9 5324 bytes
SHA-256: 14e381f1987cf1d8ad74f0329e467be0757f99de17cb3c996871289108b8212e
font_01_sfnt_off00007eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEF 10420 bytes
SHA-256: 4888f7c8e6bee8087e40c95a86f57bf6b8e10000498bb1ae5ae2e24add900925
font_02_sfnt_off0000a265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA265 16348 bytes
SHA-256: 44344d777475bc27302cf71c6ce9e96b5edcb3cf6b8673c7cacff1863add0d01