Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70ab388cd129a69…

MALICIOUS

PDF

50.9 KB Created: 2020-10-01 01:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6c80fd8f8662e6ae7c4c2e539127c013 SHA-1: 3150f7060315e6449f7f19b7183ce93f6a797ad3 SHA-256: c70ab388cd129a69e3651c7bee31a5c3eddb85d02cfe6826b24cc364942edaed
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=guide+astronomie+debutant+pdf In PDF document text
    • http://mozevem.projectqueery.org/uploads/1/3/1/3/131398008/guwugujafoluloruz.pdfIn PDF document text
    • http://bakajave.harvesthouserestorationcenter.com/uploads/1/3/1/4/131455069/6822978.pdfIn PDF document text
    • http://remena.brittanyrhager.com/uploads/1/3/1/1/131163953/f0bf3e43f.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/58491830075.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/karimogoxipejunolisek.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/8b77a958-0386-4678-9836-4e878a4695fa/29408260651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d1d48e-91f7-427f-9e79-3412d372408d/73745076095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65f089c-88ce-45a9-81c0-e4c7a924192f/42355215285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7590e90e-7540-4852-a93e-44123b48dbeb/ralolurepunidamiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1ea72d-e273-4e1f-a28f-a69b0e273ebf/fovujagir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1a1c86-a5fc-4653-95e1-c195b98c2af6/19283426046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6775b3e-d3d1-4459-9e71-0bd6f7102b6b/gisipage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b30109b-1a64-4d7f-aecb-8460a78edec9/tifutukusenasit.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 5328 bytes
SHA-256: 88e7f467ac30d9dd8ea1ce213474e3f891ae2f4d9e3cc62a639116af854114e7
font_01_sfnt_off00007ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DED 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000867a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867A 9940 bytes
SHA-256: f2e2bf37fb33f160f66c0af5d1803dec4c670b4a0a02a4d38a0b049caa422731
font_03_sfnt_off0000a899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA899 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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