Malicious PDF — malware analysis report

Static analysis result for SHA-256 2798ec0d906f55d4…

MALICIOUS

PDF

34.3 KB Created: 2020-04-28 21:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b616aff852eee8156aea3e1d8d59bc4a SHA-1: 45474428434605389b92f072ae8d36c73cb2fb49 SHA-256: 2798ec0d906f55d455647e152dfab3715f9073b50ea3946836b0463a7aac82dc
92 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many pointing to PDF files with numeric slugs, indicative of a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains references to URLs that are likely part of this scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://blockchainambassador.ca/uploads/1/3/0/6/130621460/130621460.html#idioms+in+a+sentence+worksheets
    • http://caps-kawauchi.net/uploads/1/3/0/5/130550723/lupedowivufaka.pdf
    • http://catalystiv.com/uploads/1/3/0/2/130291441/5736708.pdf
    • http://theteamexp.com/uploads/1/3/0/7/130776034/papuwixojomoribatego.pdf
    • http://elkephilips.com/uploads/1/3/0/3/130323174/9180367.pdf
    • http://squeekycleen.net/uploads/1/3/1/4/131453019/152100.pdf
    • http://theactorsworkout.org/uploads/1/3/0/7/130775382/tovew.pdf
    • http://ckcooling.com/uploads/1/3/0/4/130435712/4900451.pdf
    • http://pconlinehub.com/uploads/1/3/1/0/131069887/narupu_fekezadit_pinulapib_zagibobipodebo.pdf
    • http://precisionautosalesllc.com/uploads/1/3/1/4/131437648/1ceeb561ad5c355.pdf
    • http://bigislandgoatcheese.com/uploads/1/3/0/6/130621896/finufufunefi-kajidiluz-xasesoluk-maratudufo.pdf
    • http://vanessaseals.com/uploads/1/3/0/9/130969356/3fe6792f.pdf
    • http://urbanabstract.art/uploads/1/3/0/6/130621854/funakopagivujugogodo.pdf
    • http://lunadconsulting.com/uploads/1/3/0/8/130814104/2661823.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d67.bin
ce0250807fe000219e83be0d3b1409a4783e601a98068dc19a8923ca2258f96b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 8236 bytes

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