Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2146867f1f0ea62…

MALICIOUS

PDF

43.0 KB Created: 2020-09-30 01:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fcd75e8652831039207ee952e6ab362b SHA-1: a71a5e821fded52e6941aa71a09e6bad1ab8a943 SHA-256: e2146867f1f0ea62ce04a128a2349e4ced9e94f9befba249a0a62c42a7989038
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/strik?keyword=down+payment+receipt+pdf In PDF document text
    • http://files.turnditchlife.co.uk/uploads/1/3/0/9/130969220/1448296.pdfIn PDF document text
    • http://files.teachus2paint.com/uploads/1/3/1/0/131070331/xuled.pdfIn PDF document text
    • http://files.blessingsfromabove.net/uploads/1/3/1/0/131070911/f8fd4fe9e.pdfIn PDF document text
    • https://site-1037846.mozfiles.com/files/1037846/98704147171.pdfIn PDF document text
    • https://site-1036850.mozfiles.com/files/1036850/55492035520.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/78675863062.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/83473724590.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/77926273501.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/54952230183.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/ruwusinozadufilafubi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8691/2415/files/ramubejasabapawutulubupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/favonarudamesulijow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/advantages_and_disadvantages_of_nuclear_and_extended_family.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_off00006b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6F 5284 bytes
SHA-256: 987757b5f29c3d13e77573b197d02dc0e3c2f43b071648496eb4984cfce5831b
font_01_sfnt_off00007d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D76 10384 bytes
SHA-256: b97fc9c3a61d71a60a1f5bb5cde02c836c48cccec2829ce5821d55faf5ff5802

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