Malicious PDF — malware analysis report

Static analysis result for SHA-256 352bb411adf49c50…

MALICIOUS

PDF

43.4 KB Created: 2020-04-03 11:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 38468e67d45859f645f20a4f53a9bf40 SHA-1: 49ed9fb91fdb7d57e0b1d186e1021dd31ef4c79f SHA-256: 352bb411adf49c500f87bd251b3849384debeea13a759053f1a2c0f89b1dfc1f
94 Risk Score

Malware Insights

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

The PDF 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, though heavily obfuscated, contains references to these URLs, suggesting a coordinated effort to direct users to a network of linked PDF files. No scripts were extracted, and the primary malicious activity appears to be the distribution of links.

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://ucanexcel.ca/uploads/1/3/0/7/130738564/130738564.html#parts+of+speech+review+worksheet+middle+school
    • http://norciagala.com/uploads/1/3/1/3/131381237/zisaze.pdf
    • http://yournextchapter.net/uploads/1/3/0/8/130873796/270afd1c92fbeac.pdf
    • http://remarkablegetaways.net/uploads/1/3/0/3/130323339/xoxoxesimanu.pdf
    • http://resortbuyout.net/uploads/1/3/0/5/130590431/1652038.pdf
    • http://gilroygaragedoors.com/uploads/1/3/0/7/130775294/luxowamemus.pdf
    • http://raineybrookpointe.com/uploads/1/3/1/0/131070859/liniw.pdf
    • http://devineme.com/uploads/1/3/0/5/130540266/eb98674622b7.pdf
    • http://loebersucks.com/uploads/1/3/0/5/130550781/ded0a8d7b39da.pdf
    • http://cfcps2020.ca/uploads/1/3/0/8/130813592/f35e88398.pdf
    • http://goodmanmyanmar.com/uploads/1/3/0/9/130969963/38c6e761a.pdf
    • http://mysweetlullabiesnannies.com/uploads/1/3/0/5/130538992/jugamuwasade.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_off000080ee.bin
592a033125d5634cae6c9153d57bf7b93eb6684c460cb3bd8b03bc18554dde99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80EE 7572 bytes

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