Malicious PDF — malware analysis report

Static analysis result for SHA-256 8005544ad0885032…

MALICIOUS

PDF

58.4 KB Created: 2020-06-05 09:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a48ccc05b9c031413c7cdaeceec2f9 SHA-1: 98818185ac0041e24f17921c5e84fad59a8bfbf2 SHA-256: 8005544ad0885032343b38a47d4ca137c917d6457a544ce687d961b8439a1e08
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body includes text that appears to be SEO-related, suggesting an attempt to manipulate search engine results or direct users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://h-anon.org/uploads/1/3/1/6/131606556/131606556.html#intitle+index+of+pdf+hack
    • http://nhappyandbeautiful.store/uploads/1/3/0/7/130775659/7124549.pdf
    • http://myblacksedanjetta.com/uploads/1/3/0/6/130620612/c08fa.pdf
    • http://nathaliedesignanddecor.shop/uploads/1/3/0/7/130775104/pogaserilezuf.pdf
    • http://hallesdumujon.com/uploads/1/3/1/6/131607866/nadeduvadukoge.pdf
    • http://infinitypoolsidaho.com/uploads/1/3/0/8/130874318/6458429.pdf
    • http://h-anon.org/uploads/1/3/1/6/131606556/terms.html
    • http://h-anon.org/uploads/1/3/1/6/131606556/dmca.html
    • http://h-anon.org/uploads/1/3/1/6/131606556/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zovokage.files.wordpress.com/2020/06/72329262629.pdf
    • https://fokolivemuxe.files.wordpress.com/2020/06/30325499846.pdf
    • https://badodisorel.files.wordpress.com/2020/06/dijitovimitenaz.pdf
    • https://xobajowupoda.files.wordpress.com/2020/06/91047490026.pdf
    • https://resipotagag.files.wordpress.com/2020/06/35816727263.pdf
    • https://duvopuzuti.files.wordpress.com/2020/06/xijiwugugum.pdf
    • https://pekevimiba.files.wordpress.com/2020/06/11175911813.pdf
    • https://pawelulewo.files.wordpress.com/2020/06/8014245518.pdf
    • https://nesafet.files.wordpress.com/2020/06/68461154469.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7f7.bin
bba968a336f0d8bd7b43f712c6a791d38290fbc72000a24f630e84ae5a3af5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F7 11484 bytes

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