Malicious PDF — malware analysis report

Static analysis result for SHA-256 20067dd2af22fab3…

MALICIOUS

PDF

36.5 KB Created: 2020-04-18 12:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 168ce2ee321e4ddf961302998ad56069 SHA-1: 1d8ae9cc71e75f960e94217c9892eee5f7bee1c4 SHA-256: 20067dd2af22fab34cdc347ccb7f514974b923cc9e684680cfb31aa8365bde84
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent of directing users to potentially harmful external sites.

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://everestdobie.com/uploads/1/3/0/4/130488812/130488812.html#spectacular+now+subtitles
    • http://emmamuirheaddesign.com/uploads/1/3/0/6/130621137/6953339.pdf
    • http://restorativebodyworkboulder.com/uploads/1/3/0/4/130477775/4357811.pdf
    • http://htoursi.com/uploads/1/3/1/4/131406735/silaruj.pdf
    • http://mepsystems.org/uploads/1/3/0/3/130324126/xodudukusediz.pdf
    • http://amazingbeachweddings.com/uploads/1/3/0/5/130588185/5877083.pdf
    • http://doctorreneecotter.com/uploads/1/3/1/3/131384306/1362069.pdf
    • http://theglambarleeds.com/uploads/1/3/0/4/130478360/f4037ab3289.pdf
    • http://bnppriskrfp-capgemini.com/uploads/1/3/0/9/130969710/buvoxuginisofixof.pdf
    • http://siquijordive.com/uploads/1/3/0/5/130551362/jebodinikotulop_xiberugulap_xojeradagod_nokigejarekava.pdf
    • http://508weddings.com/uploads/1/3/0/6/130621900/1458922.pdf
    • http://thelittlestdetail.com/uploads/1/3/0/5/130542866/52c46.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_off00006511.bin
b7e4dbfb01781c5d79c9023f7a488cede44d1798968e8bce35bd77d58c79a209		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6511 8596 bytes

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