Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e13bcdc394db8a7…

MALICIOUS

PDF

44.6 KB Created: 2020-11-09 07:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7bd8129683c31171fafefc7df0ffeaec SHA-1: da3fd1db6b8f774e3a596bab5c6babe6bcf30445 SHA-256: 0e13bcdc394db8a7766d79f8d452efefabf030b5014a6d3ef432d8ce20e41a41
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://traffking.ru/aws?keyword=puritan+literature+test In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f99190833ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f90305e4fe38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5f8d3e199b50b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_5f9ef3de9caa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f951328da375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8a314fc129b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fa2328fc3b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f9d53347be2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8a723332-e333-4798-a85a-560656d5cb6a/renault_clio_body_kit_mk3.pdfIn PDF document text
    • https://vusesalo.files.wordpress.com/2020/11/71055606177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7436bf26-46ee-4a72-9205-54922ae42819/ge_jc024_universal_remote_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4436bcf0-9763-4a0a-b7d1-8aec8917408c/northeast_georgia_resa_winterville_ga.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 4452 bytes
SHA-256: 5a93c568441eb4fddbfb4a235259a263e81c7cbc8c54bffa4159ce11569d1518
font_01_sfnt_off00007381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 10588 bytes
SHA-256: 32188a99d06a6d45cac09a0f14e53879b58e4a1f865a033017c618e5e1a4375d
font_02_sfnt_off0000978c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230