Malicious PDF — malware analysis report

Static analysis result for SHA-256 864445db633618aa…

MALICIOUS

PDF

50.1 KB Created: 2020-11-07 22:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 982a7facf9fcbfe551b8233701920aec SHA-1: 43230bcc57340a041cf5ff0a7c37773f15123fbf SHA-256: 864445db633618aa1282efa58ecbf855bad8d02e0aa8eded4d5b97f8ff0cd3ef
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://traffking.ru/aws?keyword=obama+disbarred+lawyer In PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/vobelefutitob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xojomome.files.wordpress.com/2020/11/falilobugokerujoxale.pdfIn PDF document text
    • https://ronesifipule.files.wordpress.com/2020/11/diabolik_lovers_game_english_online.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://salemug.files.wordpress.com/2020/11/noxuxubowado.pdfIn PDF document text
    • https://rusemutizad26936132.files.wordpress.com/2020/11/aerospace_structural_analysis.pdfIn PDF document text
    • https://gexaxigos.files.wordpress.com/2020/11/gawabudak.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://dulifegu.files.wordpress.com/2020/11/2005_ford_escape_workshop_manual.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://dipadek.files.wordpress.com/2020/11/dufenotugukidozukolek.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_off000083b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 5332 bytes
SHA-256: 1435ee436fc5edea7bd15071bec60e39bdfd0d1f995b3723006b453c8486b4c7
font_01_sfnt_off000095c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 11456 bytes
SHA-256: cca117e4da802eff5e624feee1ba2ca95f1fd9b0e5e86f154b6576a922070f5c

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