Malicious PDF — malware analysis report

Static analysis result for SHA-256 6666a4fbe3f02745…

MALICIOUS

PDF

35.2 KB Created: 2020-05-22 01:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f1c34d547ea519502fb09f82f3f3af SHA-1: 74590cb6905d5eb0ff9baf70c3d531c726d91a0e SHA-256: 6666a4fbe3f02745b076e04e83befa4a043f792dd7ed1a814755c1d727334c6b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF document contains a large number of external links to other PDF files hosted across various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting the primary purpose is SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://7cstravel.voyagerwebsites.com/uploads/1/3/1/6/131636930/131636930.html#adjectives+synonyms+and+antonyms+exercises+pdf
    • http://my123math.com/uploads/1/3/0/3/130323235/6467560.pdf
    • http://kimbescorner.com/uploads/1/3/0/7/130775310/8d33a539e.pdf
    • http://ecoleafdesignstudio.com/uploads/1/3/0/7/130740609/bozufofuzupoton.pdf
    • http://anyma-madagascar.fr/uploads/1/3/0/3/130312937/rilukemesi.pdf
    • http://mcnallyspinalcare.com/uploads/1/3/0/7/130775470/1729458.pdf
    • http://bottlecapmultimedia.com/uploads/1/3/0/2/130273623/09d706bb09d0.pdf
    • http://redneckognize.com/uploads/1/3/1/4/131453194/vevakoli_wipurujow_vatimunapima.pdf
    • http://egomeum.com/uploads/1/3/1/4/131437229/44d5d51734.pdf
    • http://heights-hall.net/uploads/1/3/1/6/131606494/288a5.pdf
    • http://naefi.com/uploads/1/3/1/4/131437261/006e229b2.pdf
    • http://iyouth.global/uploads/1/3/1/0/131069859/7176508.pdf
    • http://realestatecartel.com/uploads/1/3/0/7/130739975/13c1e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db1.bin
7908da3243d67c1c76cbea84966fdbf4c9689bf8a22fc232cfb5778b9da4330a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB1 10500 bytes

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