Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffee48dc2c4921e…

MALICIOUS

PDF

40.3 KB Created: 2020-03-07 18:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 460f71c4983d9d4cee83974bc545a349 SHA-1: 8b8ea3782d02f310b6b417ad979c6d1b6d211ddd SHA-256: 0ffee48dc2c4921eeaecf009655fa8b9a64ec7271bf4275eb97a32ed57c38b78
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to unrelated domains supports the conclusion that this document is part of a link farm or redirection scheme. No scripts were extracted, and the document body is heavily obfuscated.

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://vps23.pleasingfood.com/uploads/1/3/1/0/131071290/131071290.html#icd+10+code+for+mdro+acinetobacter
    • http://msmazzocchi.net/uploads/1/3/0/6/130604525/4907162.pdf
    • http://www.peacockchildcare.com/uploads/1/3/0/8/130815311/8882892.pdf
    • http://sonsandbrothers.com/uploads/1/3/0/5/130550729/6259908.pdf
    • http://www.simplelegalinc.com/uploads/1/3/0/8/130874347/54e487c8.pdf
    • http://oakleykambel.com/uploads/1/3/0/7/130738939/zusalosub-mamijozi-geruvuwagokan-nopuge.pdf
    • http://mathplusmore.com/uploads/1/3/0/6/130639539/bd1d803b70f6ee4.pdf
    • http://gerrysconcretepumping.com/uploads/1/3/0/8/130873908/25aa26.pdf
    • http://www.moofishs.co.nz/uploads/1/3/0/4/130476970/8041112.pdf
    • http://miss-stevens.com/uploads/1/3/0/3/130313249/vasadusas.pdf
    • http://www.marquesdiscount.fr/uploads/1/3/0/4/130490444/91f5bd6d.pdf
    • http://www.omgps.co.uk/uploads/1/3/0/6/130621548/susil.pdf
    • http://rhspca.com/uploads/1/3/0/8/130813601/rinuxokivorozu.pdf
    • http://fortyouthtriathlon.com/uploads/1/3/0/2/130270793/9835361.pdf
    • http://odazzitclub.com/uploads/1/3/0/2/130287997/24b6ba1c69581ef.pdf
    • http://beyondthelands.com/uploads/1/3/0/6/130604737/6030330.pdf
    • http://newparanormalsociety.com/uploads/1/3/0/6/130621689/7047971.pdf
    • http://adamschau.com/uploads/1/3/0/6/130639706/fakevuta-nozemumelete.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_off000076c8.bin
aae93aca4114bf9d4c5a7d18c93d4e6e501f48abc321df6abc86dca5febf7bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C8 7548 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.