Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4835357e2d3baa…

MALICIOUS

PDF

77.3 KB Created: 2020-06-17 09:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11137dfdc362973948536433fc30cde SHA-1: 6d4c39332bece9d907fd85c906fe1bbb486391ea SHA-256: dc4835357e2d3baad839dff36d4bf5648b77a3200258554f7478f971498dd9d4
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or SEO spam, with numerous embedded URLs pointing to other PDF documents. The document body, though partially obfuscated, contains text suggesting a 'crime stories pdf' lure. The primary attack pattern involves directing users to a network of external sites, likely for malicious redirection or further exploitation.

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://cococlase.com/uploads/1/3/0/8/130813835/130813835.html#crime+stories+pdf
    • http://myqueenstatus.com/uploads/1/3/0/9/130968995/tatasetojijenerovok.pdf
    • http://oi.undesirable.us/uploads/1/3/2/3/132302857/6446704.pdf
    • http://medilaser.org/uploads/1/3/0/7/130740048/619983.pdf
    • http://maynganhmay.com/uploads/1/3/0/5/130545954/4820913.pdf
    • http://inhousecomp.com/uploads/1/3/0/6/130620575/jenusapomavu_ronokumalow_wogiruku_wumamuz.pdf
    • http://mail.freeshipcbd.com/uploads/1/3/0/8/130874161/pojebafalo_dawine.pdf
    • http://jharold.org/uploads/1/3/0/2/130289535/773963.pdf
    • http://mdprtnrs.com/uploads/1/3/0/8/130874010/dca96f3ce56.pdf
    • http://lyncdiscover.vytru.com/uploads/1/3/1/3/131380299/seluri-gidavomujevoj-jaxeb-xavaketodije.pdf
    • http://doubleheartsoapcompany.com/uploads/1/3/0/3/130312952/2612be8f6ac7.pdf
    • http://bluebackyardmiami.org/uploads/1/3/1/6/131636728/7946510.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c4.bin
991b696a167be5ad855aa0163a7d9c8e59228709c5e84805adb0a289827fb451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 4648 bytes
font_01_sfnt_off00010198.bin
edf76b663217223bc78c5d731dda5dcd5ac64c49b8403e8cfcefd1156d2e49bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 11732 bytes

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