Malicious PDF — malware analysis report

Static analysis result for SHA-256 16be2f384a7ebc60…

MALICIOUS

PDF

39.3 KB Created: 2020-03-12 06:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 97a011d8e4b869a993b3cfe63dfb5dc0 SHA-1: 9c86b098ce041a79f05d4031962c900dd5fce964 SHA-256: 16be2f384a7ebc607588ffeec0ea2ffb3024c5afdf7cd902ee62b4db1e51aef7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links to external websites, many of which appear to be part of a link farm designed to distribute malicious content. The primary URL, http://74-123-72-229.mgwnet.com/uploads/1/3/0/9/130969593/130969593.html#acid+catalysed+aldol+condensation+mechanism, is likely a lure to a malicious page. The presence of numerous PDF links suggests an attempt to broaden the attack surface or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://74-123-72-229.mgwnet.com/uploads/1/3/0/9/130969593/130969593.html#acid+catalysed+aldol+condensation+mechanism
    • http://www.flueandhearthnotes.com/uploads/1/3/0/5/130590525/ralimegiruxikoz.pdf
    • http://oakwoodowls.com/uploads/1/3/0/3/130323552/733319e57dad17c.pdf
    • http://thekindleproject.com/uploads/1/3/0/8/130814483/0569a5bf7ebc0b5.pdf
    • http://beaudoinpercussion.com/uploads/1/3/0/6/130639350/sesulibug.pdf
    • http://ellisonglobalinvestigations.com/uploads/1/3/0/6/130604859/2833343.pdf
    • http://www.anel.me/uploads/1/3/0/5/130543402/medoxijina.pdf
    • http://yogicbrad.com/uploads/1/3/0/7/130740351/bozazitege.pdf
    • http://www.uvtumbling.com/uploads/1/3/0/3/130313458/ludenug-wosukeded-rifataduru-bimajinojegofa.pdf
    • http://shrinkysheets.com/uploads/1/3/0/6/130621775/xobapuralof_gevalakolita_ropusejid_xuwedakabe.pdf
    • http://www.nyiabc.com/uploads/1/3/0/4/130483869/9501294.pdf
    • http://bridal-makeupartist.com/uploads/1/3/0/6/130604560/8933614.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674a.bin
7d070c0d428ffdb3a7022c88e4f6c0c4f7431d9495e77f006d292a1069d7a957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 7536 bytes
font_01_sfnt_off000084c9.bin
c048ac4ed90d63bfae46472f65f9cf6fc0bd5e75369f2d8f28771a6d96a2731c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C9 3156 bytes

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