Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b7312988efe674…

MALICIOUS

PDF

44.5 KB Created: 2020-09-30 10:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e212efd49c49de18043b0ceef53f4c2f SHA-1: 2d0c716058fa32a540cd3cb401369139db0e2a3e SHA-256: 97b7312988efe674ffd350a45575a04516e2fecea4a2ba8e01eddfa7bbd8c8d2
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=advanced+english+vocabulary+list+with+meaning+pdf In PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/10438619847.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/74240516627.pdfIn PDF document text
    • https://site-1037846.mozfiles.com/files/1037846/tikipibuw.pdfIn PDF document text
    • http://bukuvudoj.sunilgupta.net/uploads/1/3/1/4/131452958/lulilubavokupizeturi.pdfIn PDF document text
    • http://files.las-core.com/uploads/1/3/1/6/131636808/refopifizim_jetedolizoli.pdfIn PDF document text
    • http://files.gwenrobinsonmedium.com/uploads/1/3/1/4/131453998/manibokajaxawafog.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/2280750e-b49d-49f1-85fb-d0b43723afa3/mubibexitux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2e0e53-2691-4abe-8567-76f4a1afde53/rulowogoludonotew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97893ad5-a606-42f8-9da2-660cfaa8c3cb/6849943521.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_off00006d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 5952 bytes
SHA-256: 145f2ac507ab9d91e5f94a7d4a75b71727e7abd059bd0a5ce9411af728bcc75a
font_01_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 10552 bytes
SHA-256: a5a4fda7a153cae320e94a76614871743b70ac96c1385ca4e24b80f5d628f1bd