Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bccd9678fcdb588…

MALICIOUS

PDF

28.8 KB Created: 2020-04-18 07:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02e2103e9e2ec49abb1876b67709c48a SHA-1: 1ee0c64cef6555630eead6b96e51e7a8bdd6513d SHA-256: 6bccd9678fcdb58829e438542f5a988cfeae942ad76018608801983953b6764c
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains text related to a 'Christian Dior women's size guide' and the wkhtmltopdf application, indicating a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs points towards a phishing or redirection attack.

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://popjetfountain.com/uploads/1/3/1/0/131070678/131070678.html#christian+dior+women%27+s+size+guide
    • http://phytocapital.com/uploads/1/3/0/4/130477170/c9652eae.pdf
    • http://ghostyz.com/uploads/1/3/1/3/131384660/07e001.pdf
    • http://pageappliance.net/uploads/1/3/0/6/130639708/fonedudav-timazoger-bakametesimov-tukeru.pdf
    • http://botte-boot.com/uploads/1/3/0/5/130590656/xofupubow_fagapevi.pdf
    • http://agroecologyinternational.org/uploads/1/3/1/4/131482999/xoritanat_regopupov_kipox_zijabugu.pdf
    • http://salomemilano.com/uploads/1/3/0/2/130288811/1646590.pdf
    • http://libanpub.com/uploads/1/3/0/5/130545985/kowusanikasonuzij.pdf
    • http://meest.ca/uploads/1/3/0/5/130590582/1ddb92d.pdf
    • http://bojoh.org/uploads/1/3/1/3/131384516/3075288.pdf
    • http://integratedbioproductsllc.com/uploads/1/3/1/4/131453984/tutuwoxo_nubijeluruf.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_off00004c72.bin
cc6321ec85eba1b6bd410497e32af819094a27933ea53337b7cd10e8931a983a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C72 6932 bytes

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