Malicious PDF — malware analysis report

Static analysis result for SHA-256 302b7de0ad90a4f4…

MALICIOUS

PDF

49.0 KB Created: 2020-04-23 19:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bc39490ff919d5bfa03b5258e98401b8 SHA-1: 0dfe5c0480d3d339b00977d47a82771f15fe57d9 SHA-256: 302b7de0ad90a4f46916af791b095493a4f112d802d1e6769192834ab016c6d9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body, though partially corrupted, contains references to 'Captain America 2014 dual audio' and authoring information, indicating an attempt to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to direct users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 3

  • 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
  • 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://cassowarycoastrainforeststories.com/uploads/1/3/0/7/130775219/130775219.html#captain+america+2014+dual+audio
    • http://katiegracecollins.com/uploads/1/3/0/5/130541351/36936ff.pdf
    • http://badgerhouselifter.com/uploads/1/3/0/2/130272231/5117563.pdf
    • http://bestfitnesstrackerreviews.com/uploads/1/3/0/7/130739129/xikaposedada.pdf
    • http://sanpanchostacos.com/uploads/1/3/0/6/130620642/a5e6bc1417e5.pdf
    • http://mylistingedge.com/uploads/1/3/1/3/131379591/bawibid-sinukigaw.pdf
    • http://henhouserecording.com/uploads/1/3/1/4/131453056/texokaja.pdf
    • http://unicornsandrainbows.store/uploads/1/3/0/5/130539885/8046788.pdf
    • http://thedairy.online/uploads/1/3/1/3/131379324/bujubatekokom-topeg-piwezoxuzoli.pdf
    • http://lifeadaringadventure.com/uploads/1/3/0/8/130813055/vinituperuxugop.pdf
    • http://renaissancemidwifery.ca/uploads/1/3/1/0/131070125/7094816.pdf
    • http://thedairy.online/uploads/1/3/1/3/131379324/buju

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dea.bin
68a4a10c2e5b7c7e12a488eba12f6d2ce77865568dc676daa01319bf739552d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEA 8792 bytes
font_01_sfnt_off0000af82.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF82 1388 bytes

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