Malicious PDF — malware analysis report

Static analysis result for SHA-256 af30e00db506be80…

MALICIOUS

PDF

32.8 KB Created: 2020-10-09 00:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bf49b69a77e20e5f49e5cb6a85696774 SHA-1: 8ced570b27867e61a0ca48df25927e4b8b601e92 SHA-256: af30e00db506be80a70e4951141ce2ca4358d8c059a5bd2fe3c98dcc899ac3b7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body is obfuscated but contains search terms for a popular movie, likely a lure to encourage clicks. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.
  • 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.
  • 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=kanthaswamy+full+movie+tamil+hotstar In PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/rufijisefiduzeboxujariwid.pdfIn PDF document text
    • https://site-1043375.mozfiles.com/files/1043375/26668021505.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/dolewujodujegu.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/pubitomifope.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/mubakubotujafozewin.pdfIn PDF document text
    • https://site-1042734.mozfiles.com/files/1042734/munegiwumana.pdfIn PDF document text
    • http://files.desertsongstudio.com/uploads/1/3/1/4/131437322/4ba2e2fea.pdfIn PDF document text
    • http://files.eunjukang.net/uploads/1/3/0/7/130740110/205107.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/de103406-419f-4b40-ba14-3d414a61ea2e/38353382670.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_off000043fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FD 5232 bytes
SHA-256: 7f062e240fc43197e9902bb235c022015ee1624af4df30766557a9dc55631c41
font_01_sfnt_off000055c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C1 9540 bytes
SHA-256: c1a150146f59be9d83d8719a3cc63516a0f09c531ed5fe068767f49d5413b3fe

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