Malicious PDF — malware analysis report

Static analysis result for SHA-256 d000b65ca3cdd571…

MALICIOUS

PDF

39.2 KB Created: 2020-11-05 04:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cc3cc6403aa2bd7d7091e229492108cb SHA-1: dc82e55a45b0f1e4458bd9f732a0712b30160f98 SHA-256: d000b65ca3cdd571e614c5617fb5dca63fa8a3a31bfa553a7349dd44049fe740
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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=serial+number+for+photoshop+cs5+extended In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f909587eec09.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/41c04968161c4.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/zaremunedup_sirovaxizekobev.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/4821008.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kewakuko/xozuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7668/1373/files/boomsday_combo_priest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/computer_knowledge_questions_and_answers_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/scissor_lift_safety_training.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/andrew_jackson_vetoes_second_bank_charter.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_off000059a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A5 5828 bytes
SHA-256: 44849952651336f33ae92f6bd1554de3674352700141a5c3c566f474c4fb9af1
font_01_sfnt_off00006d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 10204 bytes
SHA-256: 5cf80176e58a783550a9e5a2799f781355c668637dad4fe50599bef8b23c16e1