Malicious PDF — malware analysis report

Static analysis result for SHA-256 916d54ef0600db14…

MALICIOUS

PDF

39.1 KB Created: 2020-09-30 11:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ca43c1293d7d229d2097bb646cb00950 SHA-1: 2305e8f59401751d915e6750729198cabd6f6fed SHA-256: 916d54ef0600db14a0f3beb3398545ca186a1e2bebf2f57a565f41bfc041b014
184 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.
  • 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://ggtraff.ru/strik?keyword=telugu+kathalu+books+pdf+free+download In PDF document text
    • http://files.emma-brierley.com/uploads/1/3/0/8/130873826/c13b5b027076.pdfIn PDF document text
    • http://jedur.suzettemacgregor.com/uploads/1/3/1/6/131606349/gozodekusilutepit.pdfIn PDF document text
    • http://someraz.laurarichardsphotography.com/uploads/1/3/0/7/130738962/favixobezorofe_notikuvuxe_nomirokusipor_duxuwezitis.pdfIn PDF document text
    • http://files.vnchha.com/uploads/1/3/1/0/131071240/dcda938399c.pdfIn PDF document text
    • http://files.hamakuasacredarts.com/uploads/1/3/1/0/131070751/e2768.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/wuliropipajijuv.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/24070556602.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/padadi.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/dujinini.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/fosujijuzeligexureduwe.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/222f200c-7462-4888-96c7-054915be1869/60760830013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b886068-7469-4abb-b963-69f1ec423ab3/2579678245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ad6f59-be81-4691-a8ac-a4caa6bc0b62/40418760553.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_off00005a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A68 5548 bytes
SHA-256: 714a19f2b59cceb5ac4780ce534279f2702975305da08ad2f09d9544b46aaaca
font_01_sfnt_off00006d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D51 10084 bytes
SHA-256: 715505f2b03c87ce1c6275073eac974b706fd4dba7e794d3ee6d595f68344121

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